Saturday, August 15, 2020

Top 10 Websites to Learn Git Commands and Concepts for FREE - Best of Lot

Hello guys, like many programers, I have also worked with a lot of source control systems like SVN, CVS, TFS, VSS, Mercury, and I had always wondered why so many source control systems? Why not just one. It's one of the necessary software tools for development, and everyone needs a version control and code repository, there should be a standard solution. It seems Git and Github have solved that problem now. Now, Git is everywhere from open source to closed source, from small startups to big Investment banks, but there were still legacy projects which were lying on SVN and CVS, but they are now also started moving towards it.

Friday, August 14, 2020

Top 10 Pluralsight Courses For Java and Web Developers to Learn in 2020 - Best of Lot

Since last week, I have been sharing about my 2020 learning goals and what Java programmers should learn in 2020, but I haven't shared with you how will I learn those new technologies, like Git, Angular, React JS, Spark, and Machine learning, etc. Well, there are many ways to learn a new technique or programming language, 10 of which I have shared in my earlier post about how to learn new technologies. Still, two of the best ways to learn any new technology are by using online courses and reading books. I have been learning from books since my childhood, but ever since I have tried learning from online classes, I found them more interactive and useful.

Top 10 Pluralsight Courses to learn React.js in 2020 - Best of Lot

Hello guys, Pluralsight free Weekend is coming on this weekend. This means all the Pluralsight courses, projects, and interactive learning material will be free. Why not use this opportunity to learn React.js? I thought so and collected a bunch of React.js courses to learn React in depth. You can also use these courses to learn React.js in 3 days. By the end of this weekend, you can become zero to hero in React.js. I mean form just knowing that React.js is a cool library to build responsive UI, you can actually start building real React applications. If you can create an application on your own and deploy it you can call yourself a React Developer.

Thursday, August 13, 2020

Top 5 Courses to learn Appium for Automation Testing Mobile apps - Best of Lot

Hello guys, If you are in mobile app development like Android and iOS application development then you might have heard about Appium, one of the popular tools for automation testing mobile apps. Appium is software that lets you test your application, whether it is a native app such as an android iOS windows application or a hybrid app such as a web application before launching it to the market so to ensure that it has the quality needed and it works correctly without any errors. If you want to learn Appium and looking for the best online courses then you have come to the right place.

Top 5 Course to Crack Microsoft Azure Developer Associate Certification Exam AZ-203 - Best of Lot

Hello guys, Microsoft Azure a cloud-based service that serves as a framework for businesses to manage their services and applications, amongst other things that enables them to run a successful business. Microsoft Azure certifications are currently becoming some of the highest demanded certifications in the IT industry. Businesses that have a reason to influence cloud servers and have a high demand for various remote smart services from different locations are the ones using Microsoft Azure the most.

Wednesday, August 12, 2020

How to reverse an ArrayList in place in Java - Coding Interview Questions

You can reverse an ArrayList in place in Java by using the same algorithm we have used to reverse an array in place in Java. If you have already solved that problem then It's a no-brainer because ArrayList is nothing but a dynamic array, which can resize itself. All elements of an array are stored in the internal array itself. By the way, if you need to reverse an ArrayList then you should be using the Collections.reverse() method provided by the Java Collection framework. It's a generic method, so you can not only reverse an ArrayList but also Vector, LinkedList, CopyOnWriteArrayList, or any other List implementation.

Top 5 Courses to learn WordPress in 2020 - Best of Lot

WordPress is one of the easiest ways to create a website. It's also one of the most important tools for web designers and web developers. If you know WordPress, you can work on different kinds of companies like startups and even multi-national. WordPress also allows you to do a lot of freelancing work. The best part of using this service is that you do not need to have previous knowledge to create a professional-looking website. If you want to learn WordPress and looking for the best online courses to start with then you have come to the right place. In the past, I have shared the best courses to learn HTMLCSSJavaScriptBootstrap, and Web development and today I will share about the best online training courses to learn WordPress.

Tuesday, August 11, 2020

How to Print Fibonacci Series in Java without Recursion - Coding Problem for Beginners

Fibonacci series is a great example of Dynamic Programming, Recursion, and how the use of Recursion can result in a clear and concise solution. That's why whenever asked about writing a Java program to get Fibonacci numbers or print the Fibonacci series of certain numbers, it's quite natural for programmers to resort to recursion. The interviewer often challenged this practice by asking candidates to implement the Fibonacci series without using recursion. Yes, you read it right, you can't use recursion and this is what you will learn in this article. If you have attended your programming classes regularly then you may know that many recursive algorithms also have their iterative counterpart which uses loops instead of recursion or calling itself. We will take advantage of that concept to devise a solution to this problem.

Top 5 Courses to learn AWS CloudFormation in depth - Best of Lot

Amazon AWS CloudFormation is a service provided by AWS to manage all of your application resources in one place if your application uses many services such as Amazon EC2 and Amazon RDS and so on because managing them separately can take your time and it will be so difficult especially for complex application infrastructure. If you are learning AWS and want to learn AWS CloudFormation service in-depth and looking for the best online training courses then you have come to the right place. Earlier, I have shared the best AWS courses for beginners and today I am going to share the best online courses to learn AWS CloudFormation in depth.

Monday, August 10, 2020

Top 5 Online Courses to become a Salesforce Developer in 2020 - Best of Lot

Hello folks, if you want to become a Salesforce developer and looking for the best online training courses then you have come to the right place. Salesforce is not only that customer relationship management that used by companies to organize their works and keep the workflow up, but it is also a vast platform where developers can use to create apps, develop it, customize it and deploy it on a server. For these purposes, Salesforce has launched many certification programs that allow you to learn how this platform work and how to use it, such as the Salesforce Platform App Builder and the Salesforce Administrator and the Salesforce Development Training, which is required to become a Salesforce developer.

How to write a C like Sizeof function in Java?

If you have just started learning Java and came from C background then you might have noticed some difference between Java and C programming language, e.g., String is an object in Java and not a NULL-terminated character array. Similarly, there is is no sizeof() operator in Java. All primitive values have predefined size, e.g., int is 4 bytes, char is 2 byte, short is 2 byte, long and float is 8 byte, and so on. But if you are missing sizeOf operator then why not let's make it a coding task? If you are Ok, then your next job is to write a method in Java, which can behave like sizeOf() operator/function of C and returns the size in bytes for each primitive numeric type, i.e. all primitive types except boolean.

Sunday, August 9, 2020

Top 5 Course to Crack Microsoft Certified Azure Administrator Associate Certification Exam AZ-103/104

Acquiring skills in Cloud computing is fast becoming an opportunity and asset since most companies are applying cloud technologies in all their operations or looking for ways to learn how to do that. This is why becoming certified as Microsoft Azure Administrator is now a big step towards advancing one's carrier. With the current industry trend, it is safe to say learning how to create applications that have some if not all of their components hosted in the cloud has become a skill that is very high demand.

What is Bean scope in Spring MVC framework with Example

Bean scope in Spring framework or Spring MVC is scope for a bean managed by Spring IOC container. You may know that Spring is a framework that is based on Dependency Injection and Inversion of Control and provides bean management facilities to Java application. In Spring-managed environment bean (Java Classes) are created and wired by the Spring framework. Spring allows you to define how those beans will be created and the scope of the bean is one of those details. 

Saturday, August 8, 2020

Top 5 Courses to Learn JIRA for Programmers and Project Managers - Best of Lot

Hello folks, If you are working in Agile projects then you have come across JIRA, one of the most popular tools for planning, project management, and bug tracking. Almost all the software organization use JIRA for their software development which makes it an essential tool for software developers, team lead, tech lead, scrum master, and project managers. If you want to learn JIRA and looking for the best online training courses then you have come to the right place. In the past, I have shared free Agile courses and In this article, I am going to share the best courses to learn JIRA online for both beginners and experienced developers.

Top 20 Spring Boot Interview Questions with Answers for Java Developers

Hello Java developers, there is no doubt that the Spring Boot is now the standard way to develop Java application using Spring Framework, and that's why Spring Boot Questions are increasingly becoming popular on Java interviews. In the past, I have shared many Spring MVC interview questions in this blog like the @RestController vs. @Controller, but I haven't got a chance to share any questions on Spring Boot, Spring Cloud, and Microservices. After a couple of personal requests from my readers, I thought to write about, and here comes my list of top 20 Spring Boot interview questions for Java developers.

Friday, August 7, 2020

Top 5 Courses to Crack Salesforce Administrator Certification (CRT-101) - Best of Lot

There is a good chance that you might have heard about popular Salesforce certifications like the Salesforce Certified Administrator program (CRT-101). There is a great demand for certified Salesforce administrator due to the immense popularity of Salesforce in cloud-based CRM. Salesforce is a Saas cloud business CRM (customer relationship management) that helps companies organize their works and be more productive and stay contacted to your customers and partners and enable them to keep their business alive.  It is a huge cloud platform containing many sections like marketing cloud, sales cloud, service cloud, community cloud, analytics cloud, and much more.

Top 10 IT Certifications for Java Developers in 2020

Hello guys, constant learning is part and parcel of being a programmer, and IT certification has a very important role in your career as an IT professional. There are many tangible and intangible benefits of certifications, first, they encourage you to learn more and become an expert in your fields, and second the provide recognition for your skill and knowledge. If you are a Java developer and wondering which IT certification you can do to take your career to the next level then you have come to the right place. In this article, I am going to share the best IT certifications for Java developers which include different areas like Java, Spring, Cloud, Linux, Project management, and others. You can choose the certification which aligns with your career goal.

Thursday, August 6, 2020

3 Best Spring Security Online Training Courses for Java Developers

The Spring Security is one of the leading open-source, security framework which allows you to implement security in Java-based web applications. It provides several security features like authentication, authorization, remember me out-of-the-box, which means you can directly use them without adding code or changing your class. Yes, Spring Security implements security at the application level i.e. you can even secure your non-secure resource without modifying them. It is also the leading framework to secure RESTful Web Services. Because of all these, the demand for Java developers with good knowledge of Spring Security is very high.

Top 5 Courses to learn Amazon AWS EC 2 in depth - Best of Lot

Hello folks, if you have been working in AWS then you definitely know about Amazon EC2, one of the most essential and popular AWS Service. If you are new to AWS, don't worry, I'll give a brief overview of what is Amazon EC2 and why should you learn it. And, If you are looking for online courses to learn more about AWS EC2 service then you have come to the right place. In the past, I have shared the best AWS courses for beginners and experienced programmers and in this article, I am going to share the best online AWS courses from Udemy and Pluralsight to learn AWS EC2 service in depth.

Wednesday, August 5, 2020

How to use @SpringBootApplication in Java and Spring Boot Application

Hello guys, today, we'll learn about the @SpringBootApplication annotation, one of the most important annotations from popular Spring Boot framework, which has changed the way Java developers use Spring framework for writing Java applications. In this article, I'll explain to you the meaning of @SpringBootApplication and it's used in a simple Spring Boot application. We use @SpringBootApplication annotation on our Application or Main class to enable a host of features e.g. Java-based Spring configuration, component scanning, and in particular for enabling Spring Boot's auto-configuration feature.

Top 5 Courses to learn Selenium for Beginners and Experienced Programmers - Best of Lot

Selenium is a popular choice for those interested in automating tests done in web browsers. It is an open-source tool and a Java framework, which means that it is free to use, redistribute, and even you can change what you want to make the software available to anyone who uses it. If you want to become an Automation tester or just want to learn Selenium in 2020 to add a new and in-demand skill in your resume, and looking for online courses then you have come to the right place Earlier, I have shared free courses to learn Selenium Web Driver and in this article, I am going to share 5 best Selenium online courses for beginners and experienced Programmers.

Tuesday, August 4, 2020

What is the Use of DispatcherServlet in Spring MVC Framework?

If you have worked with Spring MVC then you should know what is a DispatcherServlet? It's actually the heart of Spring MVC, precisely the C of MVC design pattern or Controller. Every single web request which is supposed to be processed by Spring MVC goes through DispatcherServlet. In general, its an implementation of Front Controller Pattern which provides a single point of entry in your application. It handles all incoming requests. It is also the bridge between Java and Spring. Btw, the DispatcherServlet is like any other Servlet is declared in the web.xml with a URL pattern but the only special thing is that the URL pattern for dispatcher servlet is enough to map every single web request to DispathcherServlert.

Top 5 Courses to Crack the CompTIA IT Fundamentals Certification in 2020

Hello guys, I have been writing about CompTIA certifications from the last few months and today I will talk about one of the most popular CompTIA certifications, the CompTIA IT Fundamentals certification exam. The CompTIA IT Fundamentals is a certification offered by the giant CompTIA company for people who are completely new and considering starting or changing their careers to the information technology (IT) industry and teaching you the very basics of many IT concepts or fields such as SecuritySoftware development, Database fundamentals, and much more.

Monday, August 3, 2020

How to Crack Spring Core Professional v5.0 Certification - Latest Spring Certification for Java Programmers

Ever since Pivotal, the company behind the Spring framework made the mandatory Spring training optional (see here), I have received many queries from experienced Java developers who are interested in doing Spring certifications. This move from Pivotal has suddenly made the Spring certification affordable for many experienced Java and Spring developers who were interested in Spring certification earlier but couldn't progress further due to expensive mandatory training. Since many of them are now preparing for Spring certifications like Spring Core 5 or Spring Professional 5 via self-study they are increasingly looking for good resources to prepare for the exam. I have received a lot of questions on preparation, books, mock exams, exam structure, passing marks, and useful resources.

Top 5 courses to learn Kubernetes in 2020 - Best of Lot

Hello guys, Kubernetes has become a very popular name today in the container management community, and it's one of the most in-demand skills and a must-learn tool for both DevOps Engineer and Developers. It is a tool written in Golang and it is created by Google. There are many things you need to take care of when working in production environments with microservice pattern and containers. These include version control, health check, rollback mechanism, and scaling. Kubernetes provides the management and orchestration capabilities to deploy containers in accordance with all the necessary mentioned things.

Sunday, August 2, 2020

10 Reasons to Learn Scala Programming Language in 2020

One of the questions my reader often ask me is, shall I learn Scala? Does Scala has a better future than Java, or why Java developer should learn Scala and so on. Well, there can be many reasons for learning Scala, like you are forced to learn because it been used in the new company you joined or your solution architect decided to use it, but that's a different story. Here, we'll talk about reasons which encourage Java developers to learn Scala.  Scala has emerged as one of the most powerful Java alternatives in recent times. It's been the JVM language of choice, leaving Groovy and Clojure way behind, and preferred as the language people want to write most code in.

Top 5 Courses to learn Amazon (AWS) QuickSight in 2020 - Best of Lot

Hello guys, if you are working in AWS then you may have heard about the AWS Quicksight tool. The Amazon AWS Quicksight is a cloud-based fast business intelligence tool that can do analysis and make dashboards and graphs out of your data as well as the AWS resource that is used by your application so it combines them into one dashboard to get more insight of your data. If you want to learn AWS Quicksight and looking for the best online courses then you have come to the right place. In this article, I am going to share the best online training courses and classes to learn AWS Quicksight in 2020.

Saturday, August 1, 2020

Top 10 Highest Paying Programming Languages You can Learn in 2020

Hello guys, If you are thinking of learning a new technology or skill to give your career a boost, both financially and work-wise, then you have come to the right place. In this article, I am going to share some of the top-paying technologies and programming languages worldwide. I have been studying the result of the StackOverflow Developer survey from last a couple of years when the list of top paying technologies, particularly programming languages got my eyes. I always thought that Java is the highest-paid technology, but that wasn't true, Python has bitten Java with an average salary of $95,706  as compared to $88,483 of the average salary for Java programmers.

Top 5 Courses to learn Progressive Web Apps in 2020 - Best of Lot

Hello guys, there is a good chance that you haven't heard about the progressive web app, the modern style of creating and distributing your application, but don't worry. In this article, you will not only learn what is progressive web apps but also see the best online courses to learn about Progressive web apps and how to build them. The progressive web app is like any regular web application built in using any web technology HTML/CSS, JavaScript, PHP, Python, and any other technology but the difference is that it can also be downloaded to your phone and work offline even without a connection so it replaces the effort and time to go to your Google Play or App Store and download the app install it on your phone.

Friday, July 31, 2020

Top 5 Courses to learn Groovy and Grails in 2020 - Best of Lot

Hello guys, you might have heard about Groovy, if not maybe heard about Grails, Akka, Play, and Gradle, the top 5 Groovy framework Java developer used. Groovy instead of competing with Java, it focuses on co-existing with Java and enhancing Java developer's capability on Java's traditional weak areas like scripting. It's not easy to write a utility script in Java but it's super easy in Groovy. This makes Groovy a powerful tool for Java developers, especially experienced Java developers who drive things in their team, projects, and organization. By learning Groovy and Grails you can enhance your Java projects and do some tasks easily which would have been difficult in Java or would have taken more time.

The Complete Frontend and Backend Developer RoadMap

Hello Guys, if one of your goals is to learn to code or to become a Web Developer in 2020, then I have something significant to share with you, the Complete Web Developer RoadMap. This is an excellent illustration of how to become a web developer in 2020 and guide you on how you can learn and master Web Development in 2020. It's a collection of different paths to learning front-end, back-end, and all other things a Web developer should know.  You will not just know about web development but about essential programming stuff which is necessary for all kinds of programmers.

Thursday, July 30, 2020

Top 3 Courses to learn Svelte.js in 2020 - Best of Lot

Hello guys, you might have heard about Svelte.js or svelte, another JavaScript framework for building component-based UI. What? A new JavaScript framework, common give me a break. Well, It's a little bit different with established Javascript frontend frameworks like React, Vue.js, and Angular in the sense that it's more like a compiler than a framework or library. In a framework-based application, you ship your code and framework code to client and they work together in runtime to create magic. While in the case of Svelte.js you don't ship framework code to your client, instead you ship a code generated by Svelte compiler based upon the instruction you wrote.

5 Things to Keep in Mind while Running SQL Queries on Production Database

Did you ever face a situation where some of your innocuous looking action has caused production issues and that too big time? Well, I hope you have not because it's certainly, not a pleasant experience. One of such innocuous looking action is running SQL queries on production databases. I had that in the past very early in my career where I removed some config as duplicates only to find after a week that it stopped publishing messages to one of the downstream. When you work in complex systems that have so many components, millions of lines of code, thousands of configuration, and many databases with hundreds of tables, you have to be really careful with anything you do.

Wednesday, July 29, 2020

5 Free Courses to learn DevOps in 2020 - Best of Lot

Hello guys, DevOps is said to be the next level technology that this world requires. DevOps is a set of practices that fuses Software Development and IT Operations. The aim here to shorten the process of software development, and without compromising with the quality of the product. Few DevOps aspects are taken from agile technology In this ever-changing industry, it’s of utmost importance to keep acquiring new skill sets. If you want to become a DevOps Engineer or just learn to improve your development and delivery process and looking for free online courses to kickstart your journey then you have come to the right place.

Top 5 Programming Languages Beginners Can Learn in 2020 - Best of lot

I have read somewhere that programmers should learn a new programming language every year ( I think it's code complete, not sure, though), but if you cannot do so, I suggest to at least learn the following five programming languages to do well in your career. Everybody loves polyglot programmer and an all-rounder who is versatile enough to write a quick script and can also write complex Java programs. In fact, it's almost mandatory for a senior developer to learn more than one language. Interviewers are giving more attention to an engineer who has good experience with multiple languages like C++ and Java go quite well, so is Python and Java. I personally like Software Engineers who have substantial experience in either C++ or Java and can write scripts in Groovy, Perl, or Python.

Top 5 courses to learn R Programming in 2020 - Best of Lot

Hello guys, if have interested in Data ScienceMachine Learning, and Statistics then you may have come across R programming language, one of the best for those jobs. R is a language and environment created for working with statistical computing and graphics. If you want to learn R programming and looking for the best online training courses, classes, and tutorials then you have come to the right place. In the past, I have shared free courses to learn R and in this article, you will find the best R programming courses from Udemy, Coursera, and edX.

Tuesday, July 28, 2020

Top 5 Essential Skills to Crack Coding Interviews in 2020

Hello guys, there is no doubt cracking the Coding interviews of tech companies like Google, Microsoft, and Amazon is very hard, but you can still crack it by carefully planning and preparing the topics and skills which matters most like Data structures and Algorithms, System Design, Multithreading and Concurrency, SQL and Database design, and of course, problem-solving skills. Being an author of Java and a programming blog, I often receive queries about how to prepare for coding interviews? How to pass Google or Microsoft Software Developer interviews? Or how can I get a software development job on Amazon or Facebook?

Monday, July 27, 2020

Top 5 Courses to learn Unreal Engine in 2020 - Best of Lot

Hello guys, if you are interested in game development then you may have heard about the Unreal engine, a popular engine to create games in C++. The Unreal Engine is open-source software that allows developers to make video games without even the need to be good at programming or even a programmer with some pre-made games such as a first-person shooter where you can edit it and not starting from scratch. If you want to learn Unreal Engine and looking for the best online courses and tutorials then you have come to the right place.

Google Protocol Buffers (ProtoBuf) - Best Alternative to Java Serialization

If you have done some serialization works in Java, then you know that it's not that easy. Since the default serialization mechanism is not efficient and has a host of problems, see Effective Java Item 74 to 78, it's really not a good choice to persist Java object in production. Though many of the efficiency shortcomings of default Serialization can be mitigated by using a custom serialized format, they have their own encoding and parsing overhead. Google protocol buffers, popularly known as protobuf is an alternate and faster way to serialize Java objects. It's probably the best alternative to Java serialization and useful for both data storage and data transfer over the network.

Sunday, July 26, 2020

Top 5 Courses to learn Bootstrap in 2020 - Best of Lot

Hello guys, Bootstrap is one of the most popular CSS Frameworks in the world. Is it meant for developing responsive and mobile-first websites? This is the reason why in the last couple of years it has grown a lot of popularity and it’s one of the essential tools for a front-end developer. If you want to learn Bootstrap library and looking for the best online courses and tutorials to start your journey then you have come to the right place. In this article, I am going to share the best online courses to learn Bootstrap from Udemy, Coursera, and edX, three of the most popular websites for online learning. These are also the most recommended courses to learn Bootstrap online.

Top 6 Courses to Learn AWS Lambda and Serverless Framework - Best of Lot

Hello guys, you might have heard about the Serverless architecture and AWS Lambda function as more and more software developers are talking about. AWS Lambda is an event-driven, serverless computing platform provided by Amazon as a part of Amazon Web Services. There is another serverless computing platform like Microsoft Azure that has Azure functions and GCP also has Cloud Functions. With Serverless frameworks like AWS Lambda or Azure Functions, a developer can write scalable, fault-tolerant code that runs in the cloud without provisioning or managing servers. I mean, you don't need to get an EC2 instance or a virtual machine to run your app. This also means you won't get billed for every hour even if your app is not running. AWS Lambda will only launch a container if there is a trigger like an HTTP request which needs to be processed.

Saturday, July 25, 2020

How to dynamically create a div in jQuery? Example

Many times you need to create an HTML element and dynamically add that into DOM without reloading the page. The traditional way of doing this is by using JavaScript's innerHtml() function but jQuery provides better ways to achieve the same effect. You can use jQuery DOM manipulation methods like append(), appendTo() or html() to add new HTML elements like div, paragraph, headings, image into DOM without reloading the page again. In this tutorial, I will show you how to dynamically create a div and add that into a page by using pure jQuery.

Top 5 Course to Crack Google Cloud Professional Data Engineer Certification in 2020 - Best of Lot

Hello guys, Google Cloud Professional Data Engineers are currently in demand for their ability to maintain the process of accumulating, converting, and publishing data with a certain level of expertise. They are mostly known for having the capability to put machine learning models into operation, creating and structuring data processing systems to work accurately, and ensuring that the data is secure and scalable.

Friday, July 24, 2020

How to Crack Java Programming Interviews in 2020? Topics, Courses, Books, and Questions

Java Interviews are a little bit different than traditional programming interviews on tech giants and product-based companies like Google, Amazon, Microsoft, or Facebook. First, even though it has questions from Data Structures and Algorithms like String or Array, you can still manage to clear Java interviews if you are not an expert on them. The questions are a little bit easier and more practical than those companies. Another essential thing about Java interviews are questions based upon Java programming language and JDK API. Since Java is also an Object-oriented programming language, you will find lots of OOP questions there.

Top 5 Online Courses to Learn Puppet for DevOps Engineers - Best of Lot

Hello guys, If you are interested in DevOps then you might have heard about Puppet. It is no surprise that automation and orchestration make life very easy, be it a small organization or a large-scale industry that houses hundreds of servers and Puppet plays an important role in infrastructure automation. Puppet is one of the most popular Configuration management and IT automation tool in DevOps that is used to manage various stages of the IT infrastructure lifecycle, including provisioning, patching, configuration, and management of the operating system and application components across enterprise data centers and cloud infrastructures.

Thursday, July 23, 2020

How to Find Middle Element of Linked List in Java in Single Pass

ow do you find the middle element of LinkedList in one pass is a programming question often asked Java and non-Java programmers in telephonic Interview. This question is similar to checking palindrome or calculating the factorial, where the Interviewer sometimes also asks to write code. In order to answer this question candidate must be familiar with the LinkedList data structure i.e. In the case of the singly LinkedList, each node of Linked List contains data and pointer, which is the address of the next Linked List and the last element of Singly Linked List points towards the null. Since in order to find the middle element of the Linked List you need to find the length of the linked list, which is counting elements till the end i.e. until you find the last element of the Linked List.

Top 5 Advance AWS and Cloud Computing Courses for Java and Spring Boot Developers - Best of Lot

Hello guys, if you have been reading technical blogs and articles then you might be hearing about wide-spread cloud adoption among all sizes of companies. In the last few years, many companies, both big and small have shifted their infrastructure to the cloud or in the process of doing it. I have no doubt that the next generation of Java applications will be written for and run in Cloud and that's why it's important for Java developers to learn about Cloud platforms like AWS, Azure, GCP, Cloud Foundry, and others. Thankfully Java frameworks like Spring Framework is taking this cloud move seriously and new frameworks like Spring cloud is getting popular which makes developing cloud-based application easy.

Wednesday, July 22, 2020

Top 5 Spring Boot Features Java Developers should Learn

You might have heard about Spring Boot and it's magical powers about creating a Spring Web application in just under 140 characters which can be written in a tweet, but what that really means? What are those features which provide Spring Boot such power and make Spring application development so easy? Well, that's what you will learn in this article, but if you are in hurry let me tell you that you will learn about Spring Boot's auto-configuration, Starter dependencies, Spring Boot CLI, Actuator and Spring Initializer feature in detail. These are the feature which takes away most of the pain and friction associated with writing Spring-based Java web application.

Top 5 Online Courses to learn Microsoft SQL Server (MSSQL) in 2020 - Best of Lot

Hello guys, you might know that along with Oracle and MySQL, Microsoft SQL Server is one of the most popular relational databases in the tech world. It's used in many big organizations like Investment Banks, Insurance companies, and particularly at firms that use Microsoft technologies like Windows Server. With the growing popularity and market share of Microsoft Azure, there is a good chance that the demand of Microsoft SQL Server will also increase, particularly in the cloud. There is already a high demand for both Microsoft SQL Server DBA and Programmers who have SQL Server experience, and that's why it's an excellent decision to learn MSSQL in 2020.

Tuesday, July 21, 2020

Udemy vs Coursera? Which is better to learn Tech and Programming?

When it comes to online learning, there are no better times than today, as you have access to a lot of platforms like Coursera, Udemy, Pluralsight, Educative, Lynda, CodeCademy, and many more. Out of these, Coursera and Udemy are probably the most popular ones, as more and more people have started using them. One question which keeps comings to me all the time is Coursera vs. Udemy? Which one is better for online learning and which has a better course in general? Earlier I have answered questions like Pluralsight vs. CodeCademy and Udemy vs. CodeCademy but never explained about Udemy vs Coursera, which many of my readers have been asking for some time. So, I decided to write this blog post to explain my point of view.

Top 5 Courses to Crack CompTIA Pentest+ Certification Exam - Best of Lot

Hello guys, CompTIA PenTest+ certification is a program that teaches you how to find weaknesses inside systems and how to exploit them and perform vulnerability scanning and analyzing data and much more. Given the importance of Cyber Security and Internet Security, there is a huge demand for Pen testers and if you want to become a Pen Tester then CompTIA PenTest+ certification can be a great launchpad. If you are already preparing for this certification and looking for great resources like online courses and practice tests then you have come to the right place. In this article, I am going to share 5 best online courses and practice tests to pass this difficult but prestigious IT certification in the first attempt.

Monday, July 20, 2020

How to implement Command Design Pattern in Java with Example

Hello guys, it's been a long since I have shared a Java design pattern tutorial. I did share some courses to learn design patterns but haven't really talked about a particular design pattern in depth. So, today, we'll learn one of the important design pattern, which is often overlooked by Java developers. Yes, I am talking about the Command Pattern which can help you write flexible, loosely coupled code for implementing actions and events in your application. In simple words, the command design pattern is used to separate a request for action from the object which actually performs the action. This decoupling between Invoker and Receiver objects provides a uniform way to perform different types of actions. This decoupling is achieved using a Command object, which is usually an interface with methods like execute()

Top 10 Courses to learn C++ in depth - Best of Lot

Hello guys, if you are new to the programming world or have been coding for some time then you know that C++ is one of the most popular and widely used programming languages. It was the first major object-oriented programming language that was used widely by the software development industry as well as on Academia. Many of us learned to code using C/C++ in the 1990s and early 2000s and it is still very popular at many coding schools, colleges, and computer science courses on Universities. It's also used widely in the real world. You will find C++ code on server-side applications, video games (Unreal engine), device drivers, embedded programming, and even on high-frequency trading applications.

Sunday, July 19, 2020

Top 5 Courses to pass CompTIA Server+ Certification Exam + Practice Tests - Best of Lot

Hello guys, If you are preparing for CompTIA Server+ certification and looking for the best online training courses and practice test then you have come to the right place. In this article, I am going to share the best courses, practice tests, and exam simulator to prepare for this prestigious exam. If you don't know, CompTIA Server+ is a certificate offered by the giant company CompTIA and its purpose is to teach you how to take care of servers from managing maintaining and troubleshooting in order to work properly.

Saturday, July 18, 2020

How to find the largest and smallest number in given Array in Java

Hello guys, today I am going to discuss one of the frequently asked programming interview questions to find the largest and smallest number from an integer array. This question is commonly asked on telephonic interviews and the first round for screening candidates. This coding problem is in the same league of other frequently asked algorithmic questions like Fibonacci, Palindrome, Prime, and Power of two checks. They are easy but you will find them difficult during the interview because of the pressure, particularly if you have not solved them before. Sometimes even if you have solved the problem one time, you tend to do mistakes because you haven't understood them properly. So, always take your time to understand the question.

Top 6 AWS Solution Architect Associate (SAA-C01 & SAA-C02) Practice Test and Mock Simulator - Best of Lot

Hello guys, if you are preparing for the AWS Certified Solutions Architect Associate (SAA-C01 and SAA-C02) certification exam and looking for challenging practice tests to assess your preparation then you have come to the right place. In this article, I am going ot share the best Practice test and questions to prepare for the AWS Solution Architect Associate  (SAA-C01 and SAA-C02) exam from Udemy, Whizlabs, and other portals, totaling more than 2000+ practice questions. These practice tests are created by AWS expert and certified developer and Solution architects like Stephane Maarek and Cloud guru Ryna Krooneberg. Mock simulators play an important role in any certification and the AWS Solution Architect Associate-level exam is no different.

Friday, July 17, 2020

How to become a better Java Programmer?

First of all, I wish you a very happy new year, guys. It's that time of year when we start afresh, make plans, set goals, and make resolutions for the new year. Being a Java developer and author of a Java blog, I frequently receive a  a lot of requests from Java programmers from all over the world about how they can improve themselves? How they can become a better Java developer and do well in their job and career. In the past, I have shared my 10 tips to become a better programmer, and every advice on that article still holds true but given it's a new year. I have decided to jot down some new resolutions for Java programmers to improve themselves, enhance their knowledge on Java Programming, and increase their value for future career growth.

Top 5 AWS Certified Developer Associate Mock Tests and Practice Questions - DVA-001 Certification

Hello guys, time and again I have said that practice questions and mock tests are an integral part of passing AWS certifications be it AWS solution architect or this AWS developer associate exam. They not only help you to prepare in an exam like environment with time constraint but also re-enforce and solidify whatever you have learned from online courses, books, tutorials, and white papers. It doesn't matter whether you have joined AWS developer courses like Ryan's course on Udemy or Stephane Maarek's course, unless and until you have practiced enough problems, you are not really ready for the exam.

Thursday, July 16, 2020

How to Sort an HashMap by values in Java 8 - Example Tutorial

In the last article, I have shown you how to sort a Map in Java 8 by keys, and today, I'll teach you how to sort a Map by values using Java 8 features e.g. lambda expression, method reference, streams, and new methods added into the java.util.Comparator and Map.Entry classes. In order to sort any Map, like HashMap, Hashtable, LinkedHashMap, TreemMap, or even ConcurrentHashMap, you can first get a set of entries by using the entrySet() method and then you can get the stream by calling the stream() method. The entrySet()  method returns a Set which inherit the stream() method from the java.util.Collection class. Once you got the stream, you can just call the sorted() method which can sort all Map.Entry objects available in Stream using a Comparator.

Top 5 Courses to Learn Microsoft Power BI in depth - Best of Lot

Hello guys, today is the world of Data and any organization which has the right set of data has a competitive advantage with others, but data alone is of no use unless you can analyze and visualize it to find useful insights. Microsoft Power BI is a tool for Data Analysis and Data Visualization. It allows you to create different kinds of data visualizations like charts and reports from your data. You can use Power BI to clean and transform data as well you can share reports and charts with other people in your organization.

Wednesday, July 15, 2020

StringJoiner.join() + String.join() Example in Java 8

Hello guys, joining multiple String literals or objects into one is a common programming requirement and you will often find situations where you need to convert a list of String or a Collection of String into a CSV String for your application. For a long time, JDK API has no way to join multiple String literals or objects together, which forces programmers to write hacks like looping through all String objects and manually joining them using String concatenation to create the final, joined String. Even though this approach worked, it was filled with errors and hacks like you need to be careful not to add delimiter before the first element and after the last element, which often caused issues, particularly in the case of beginners and junior Java developers.

Top 5 Courses to learn Django in 2020 - Best of Lot

Hello folks, If you are learning Python Programming language for Web Development, then you may have heard about the Django framework. Django is one of the popular web development frameworks to create modern web applications using Python programing language. Django is also the most popular and most mature Python web development framework around. It makes it easier to build better Web apps more quickly and with less code. Building web sites with Django is not just smart and efficient, but fun too! Learning Django can also boost your CV as its a very in-demand skill.

Tuesday, July 14, 2020

2 Ways to Check if a String is Rotation of Other in Java - Algorithms

Write a program to check if one String is a rotation of another String is a common coding problem you will find on programming job interviews.  A String is said to be a rotation of another String, if it has the same length, contains the same characters, and they were rotated around one of the characters. For example,  String"bcda" is a rotation of "abcd" but "bdca" is not a rotation of String "abcd". One of the simplest solutions to this interesting problem is first to check if two String has the same length, if not then one String cannot be the rotation of another. If they are of the same length then just create another String by concatenating first String with itself, now check if second String is a substring of this concatenated String or not, if yes, the second String is a rotation of first.

Top 5 Courses to learn Natural Language Processing (NLP) in depth - Best of Lot

Hello folks, If you're considering a career in Natural Language Processing (NLP), you might want to think about pursuing a verified certificate. As you may know, NLP is a computer science discipline that focuses on teaching computers to decipher and process the data that comes from human languages, which is unstructured and inconsistent. By going through a certificate program, you can really dive deep into the subject matter without having to go back for a full degree. Instead, you'll gain more in-depth skills and knowledge to help you reach your goals in the field.

Monday, July 13, 2020

Grokking Algorithms Review - Best Book to learn Data Structure and Algorithms in Python

Hello guys, I have read many books on data structures and algorithms like Introduction to Algorithms by Thomas H. Corman and Algorithm design manual by Steve S. Skiena, so when I come to know about this book, I thought, just another book on algorithms, but I was wrong. This is not just another book on algorithms but one of the most interesting books you will ever read on Algorithms and Data structure. It doesn't cover all the data structure and algorithms you see in Computer Science but whatever it covers, it does really well and that's what matters most for beginner programmer or Computer Science students.

Top 5 Online Courses to learn Blockchain in 2020 - Best Blockchain Certifications

Hello guys, if you are not leaving under the rock then you would have definitely heard about Blockchain and Cryptocurrencies. If you are looking for Blockchain training courses and certification then you have come to the right place, in this article, I am going to share the best online courses to learn Blockchain programming from UdemyCoursera, and Pluralsight, but before that, let get a quick overview of what is Blockchain and why it's popular.  Blockchain is a set of blocks that are open for anyone and containing information and the hash of the block and some other info.

Sunday, July 12, 2020

Difference between JVM, JIR, JRE, and JDK in Java

JRE, JVM, and JDK are three terms you often heard in conjunction with Java programming language, and most people either confuse them or think they all are the same. In this Java article, you will learn what is Java Run-time (JRE), what is Java Virtual Machine (JVM) and what is Java Development Kit (JDK) along with Just in Time compiler or JIT. Once you know what JRE, JVM or JDK means you can differentiate them easily by yourself.  This article is in continuation of the Essential JVM options which every Java programmer should know. If you haven't read those articles, you can also read them as well. 

Top 5 Courses to Learn QlikView and QlikSense in 2020 - Best of Lot

Hello guys, If you are in Business Analytics and Intelligence world then you would have definitely heard bout QlikView and QlikSense, two of the most modern tools for Business Intelligence and Data Analytics. Both products are offered by Qlik company and widely used for BI and Data Visualization performance. QlikView is a powerful tool for Data Visualization and if you are learning Data visualization you can learn it in 2020. QlikView bills itself as a guided analytics tool, which helps extract insights from large datasets. It lives up to that billing by striking the right balance between interactivity and robustness. QlikView combines the data management capabilities of a serious database, with the zippy, responsive UIs that make drilling into data really simple

Saturday, July 11, 2020

How to delete a key value pair from a HashMap during Iteration in Java - Example tutorial

Suppose you have a Map or Dictionaries like HashMap or Hashtable, which contains key-value pairs like books and their prices, and you want to delete all books whose prices are greater than 40 USD, how do you that in Java? This is one of the most common scenarios while developing Java application and many Java programmers, will say that they will iterate over Map and check each entry and then use the remove(Object key) or remove(Object key, Object value) methods from java.util.Map to delete any mapping where the value is greater than 40 USD. Though the approach is right, the answer is wrong.

Top 5 Courses to Pass CompTIA Network+ certification - Best of Lot

Hello guys, CompTIA Network+ certification is a good one if you are planning to have any kind of job position that needs networking such as computer networking analyst computer support and so on. The certification is aimed for anyone beginner or advanced level of networking knowledge and it is good also if you are considering a career in the network industry. If you already preparing for CompTIA Network+ certification and looking for the best online training courses and practice tests to get ready for the exam then you have come to the right place.

Friday, July 10, 2020

Top 20 String Algorithm Questions from Coding Interviews

In this article, we are going to see the top 20 String based coding interview question and their solution to help programmers better prepare for interviews. The string is one of the most important data structures and available in almost every programming language like Java, C, C++, Python, Perl, and Ruby. Though there implement differ the essence remains the same like String is NULL terminated character array in C but String is an object in Java, again backed by character array. The string is also available on weekly typed languages like Python and Perl.  This is why you will always find some String based coding questions on programming interviews.

Top 5 Courses to Crack CompTIA Linux+ certification - Best of Lot

The CompTIA Linux+ certification is for people that work in the IT industry and uses the Linux operating system such as the server administrator and people who work in cybersecurity and android devices and pretty much anything that runs on Linux. The certification covers many aspects of Linux such as security issues and the kernel in-depth as well as the virtualization storage networking firewalls and many more topics.

Thursday, July 9, 2020

Can a Non Static Method Access a Static Variable/Method in Java?

"Can a non-static method access a static variable or call a static method" is one of the frequently asked questions on the static modifier in Java, the answer is, Yes, a non-static method can access a static variable or call a static method in Java. There is no problem with that because of static members i.e. both static variable and static methods belong to a class and can be called from anywhere, depending upon their access modifier. For example, if a static variable is private then it can only be accessed from the class itself, but you can access a public static variable from anywhere.

Wednesday, July 8, 2020

Top 5 Courses to learn Design Thinking in 2020 - Best of Lot

Hello guys, if you are interested in creative ideas and solutions then you may have heard about the Design Thinking technique. Design thinking is the process of making good products that suit users&nbsp, and also it is a method for problem-solving by focusing on the people's needs and discovering the best creative solutions that meet these needs. If you are keen to learn about the Design Thinking process and looking for resources to learn Design thinking then you have come to the right place. In this article, I am going to share the best online courses to learn Design Thinking in 2020. You can join them to not only understand how Design Thinking works but also use them to solve problems and design products which user love.

Strategy Design Pattern in Java using Enum - Tutorial Example

Hello guys, how are you doing? I hope you all are fine and doing good in your life and career. Today, I am going to talk about the Strategy pattern, one of the useful design and coding pattern which will help you to write flexible code. The code which can withstand the test of time in Production. I'll also teach you how you can use Enum to implement the Strategy design pattern and Open Closed design principle better in Java. I have said this before that Java Enum is very versatile and can do a lot more than you normally expect from it. We have seen a lot of examples of Enum in my earlier posts like writing thread-safe Singleton using Enum and 10 ways to use Enum in Java.

Tuesday, July 7, 2020

Top 5 Courses to Pass AWS Certified SysOps Administrator Associate Exam - SOA-C01

Hello guys, I have been talking about AWS certifications for quite some time now and in the past shared how to prepare for AWS Cloud Practitioner, AWS Developer Associate, and AWS Solution architect exam, and today I am going to talking about AWS Certified SysOps Administrator Associate exam. This is probably the hardest associate-level AWS certification and I strongly suggest you appear on this exam after getting AWS Developer and AWS solution Architect exam. Though this is not pre-requisite and if you are working as DevOps engineer, you can directly go for this certification to further boost your credentials, but doing this will improve your chances to pass this certification in very first attempt and save both your time and money. It will also help you to score high which can further boost your Resume.

10 Differences between StringBuffer and StringBuilder in Java

Both StringBuffer and StringBuilder are two important classes in Java which represent mutable String i.e. the String object, whose value can be changed. Since String is Immutable in Java, any change or operation on String object e.g. converting it to upper or lower case, adding character, removing a character, or getting a substring, all results in a new String object. This can put a lot of pressure on the Garbage collector if your application generates lots of throws away String instances. To avoid this issue, Java designer presented initially StringBuffer class and later StringBuilder as mutable String. That's the main difference between String vs StringBuffer and StringBuilder and also one of the frequently asked Java questions for beginners.

Monday, July 6, 2020

Top 5 Course to learn Microsoft Excel in depth - Best of Lot

Microsoft Excel is one of the most essential tools for IT professionals. It's not only the most common spreadsheet tool but also offers powerful charting and analytical capability. It's not just useful for Programmers and Support professional but equally useful for other people working in IT and computer science jobs like Business Analysts (BAs), Quality Analysts (QAs), and Project Managers. I know many of you already know Microsoft Excel but the problem is that most of the people only know a couple of Excel functionality and miss out on many interesting things which can help you in your day-to-day job.

Top 30 Java Phone Interview Questions Answers for Freshers, 1 to 2 Years Experienced

Hello guys and ladies, in this article, I am sharing 30 core Java technical questions, from screening and phone round of interviews. In telephonic interviews, questions are short, fact-based and Interviewer expects a to-the-point reply and some keywords in answers. Accordingly, I have given very short answers to all these questions, only the main points; just to make this a revision post and not the main source for preparation. For thorough preparation, my master list of 140+ Java questions is a better one to start with. I am also expecting every Java programmer to know answers to all these Java technical questions if he has more than 4 to 5 years of experience. It's only freshers and junior developers who need to do a bit of research to understand topics well.

Sunday, July 5, 2020

Top 5 Courses to Crack ITIL Foundation Certification in 2020 - Best of Lot

Hello guys, if you are in tech support or IT Service Management professional looking to validate their skills by passing the ITIL 4 Foundation certification and looking for online courses and practice tests to prepare well then you have come to the right place. In this article, I am going to share the best online ITIL Foundation training courses and practice tests you can take to prepare for this prestigious IT certification. These courses and Practice tests are also your best chance to pass the ITIL 4 Foundation certification in very first attempt.  If you don't know much about the ITIL Foundation certificate then let me give you a brief overview first.

How to use filter + map + collect + Stream in Java? Example Tutorial

Hello guys, many of my readers emailed me to write a post about the map and filter function of Java 8 because they found it difficult to understand and use. Even though I have previously blogged about both map() and filter(), I am writing this post again to explain the concept in more layman's language for a better understanding of my readers and fellow Java developers. The map() function is a method in Stream class that represents a functional programming concept. In simple words, the map() is used to transform one object into another by applying a function. That's the reason the Stream.map(Function mapper) takes a function as an argument. For example, by using map() function, you can convert a list of String into List of Integer by applying Integer.valueOf() method to each String on the input list.

Saturday, July 4, 2020

Top 5 Courses for CompTIA A+ Certification in 2020 (with Practice Test) - Best of Lot

Hello guys, CompTIA A+ is a famous certification among beginners who wants to start a career as an IT professional and learn information technology in general. This IT certification doesn't have any requirement to take it and it is recognized in all companies around the world and includes some topics such as information security, network administrator, computer repair, operating systems, and many more computer fundamental topics. If you don't know what is CompTIA let me give you a brief overview. CompTIA stands for Computer Technology Industry Association.

Top 15 Java Multithreading, Concurrency Interview Questions Answers asked in Investment banks

Multi-threading and concurrency questions are an essential part of any Java interview. If you are going for any Java interview on any Investment bank e.g. Barclays, Citibank, Morgan Stanley, etc for Cash Equities Front Office Java Developer position, you can expect a lot of multi-threading interview questions on your way. Multi-threading and concurrency are favorite topics on Investment banking interviews,  especially on electronic trading development jobs and they grill candidate on many tricky java thread interview questions. They just want to ensure that the guy has a solid knowledge of multi-threading and concurrent programming in Java because most of them are in the business of performance which provides them a competitive advantage and it's hard to write correct and robust concurrent code.

Friday, July 3, 2020

Top 5 Courses to learn Tkinter and PyQT for Desktop Application Development using Python

Hello guys, two do not disagree that python has become nearly the most used programming language among the big companies and one of the most used fields is creating desktop applications. While many of you know that Python is heavily used in the field of Web Development, Data Science, Machine Learning, and Data Analysis, you may now that Python also has some awesome libraries and frameworks like Tkinter and PyQT5 for creating a desktop application and GUI apps.

Top 5 Books to Learn Concurrent Programming and Multithreading in Java - Best, Must Read

Books are essential to learning something new, and despite being in the electronic age, where books have lost some shine to the internet and blogs, I still read and recommend them to get complete and authoritative knowledge on any topic, like concurrent programming. In this article, I will share five best books to learn concurrent programming in Java. These books cover basics, starting from how to create and start a thread, parallel programming, concurrency design patterns, an advantage of concurrency and of course pitfalls, issues, and problems introduced due to multithreading. Learning concurrent programming is a difficult task, not even in Java but also in other languages like C++ or modern days JVM languages like Groovy, Scala, Closure, and JRuby.

Thursday, July 2, 2020

Top 5 Courses to become Google Cloud Certified Professional Cloud Architect in 2020

Hello guys, next to AWS, Goggle Cloud technologies are becoming a big part of most companies’ cloud data management system. A Google Cloud Architect aims at developing and managing solutions that are secure, scalable, and dynamic to drive business objectives. Global Knowledge tagged Google Cloud Professional Cloud Architect certification as one of the certifications in IT that paid the highest last year. Before you consider taking the Google Cloud Professional Cloud Architect exam, you'll need to be familiar with Google Cloud Platform Architecture This exam tests your ability to design and plan a cloud solution architecture, manage and provide the cloud solution infrastructure, design for security and compliance, and a whole lot more.

How to avoid deadlock in Java?

How to avoid deadlock in Java? Is one of the popular Java interview question and flavor of the season for multi-threading, asked mostly at a senior level with lots of follow up questions. Even though the problem looks very basic but most of the Java developers get stuck once you start going deep. Interview questions start with, "What is a deadlock?" The answer is simple when two or more threads are waiting for each other to release the resource they need (lock) and get stuck for infinite time, the situation is called deadlock. It will only happen in the case of multitasking or multi-threading.

Wednesday, July 1, 2020

Top 5 Courses to Crack CompTIA Cloud+ (CV0-002) Certification Exam

Hello guys, As the tech world is moving faster towards cloud computing, the demand for certified cloud practitioners, programmers, and developers in increasing and Comp TIA certification can help you to become a certified Cloud developer. CompTIA Cloud+ is a certification that validates your knowledge as a professional in managing, configuring, and maintaining the cloud services as well as what cloud computing means from a business and technical perspective. Although it is not required CompTIA recommends that you have worked on any IT related services to jump into the exam so you have at least some basic understanding in the cloud and information technology.

How Thread, Code and Data Works Together- Story of a Multi-threading Program in Java

There are certain things, which you don't learn in academics or training class, you develop those understanding after few years of work experience, and then you realize, it was very basic, how come I had missed that all those years. Understanding of how a multi-threaded Java program executes is one of such things. You definitely have heard about threads, how to start a thread, how to stop a thread, definitions like its independent path of execution, all funky libraries to deal with inter-thread communication, yet when it comes to debugging a multithreaded Java program, you struggle.

Tuesday, June 30, 2020

How to Remove a Key, Value, or Entry from an HashMap in Java 8 - Example Tutorial

In the last article, I have shown how to remove key/value pairs from a map in Java-based upon some conditions like remove all entries where values are greater than some values. I have told you that you must use the Iterator's remove() method for removing mapping while iteration to avoid ConcurrentModificationException, but that's not required anymore in Java 8. From JDK 8 onwards, you can selectively remove mapping without iterating over Map. The JDK 8 API has added several new methods to existing interfaces e.g. java.util.Collection, java.util.Map, Comparator, etc because the interface can now contain concrete methods in the form of static and default methods.

Top 5 Courses to Crack CompTIA Security+ Certification (SY0–501) in 2020 - Best of Lot

Hello guys, the CompTIA Security+ certification aimed to be for people who are a beginner in security but at least have some fundamentals in IT in general and you will learn some fundamentals in security such as SQL injection, malware, zero-day vulnerabilities, and much more. Having a certification such as CompTIA Security+ on your resume is a plus because if you are thinking to have a job to let’s say in an IT field.

Monday, June 29, 2020

Top 5 Courses to learn Full Stack Development with Python in 2020 - Best of Lot

Hello guys, If you are a Python programmer and looking to become a full-stack developer using Python programming language then you have come to the right place. In this article, I am going to share 5 best online courses you can join to become a full-stack Python developer in 2020. There is a huge demand for the full-stack developers and there are not many with Python skills, which means a huge opportunity for Python developers.  The full-stack web development is an extended-term that covers different stages of software development like coding, project management, front-end also the back-end technologies, database management systems, and much more.

What is happens-before in Java Concurrency? An example

A couple of days ago, one of my readers messaged me on LinkedIn about a Java interview question he has recently faced - what is the happens-before relationship in Java concurrency? What is the benefit of it, and how exactly it works? He kind of has some ideas about that its related to the Java Memory Model and provides some sort of visibility guaranteed but couldn't explain with conviction to his interviewer, particularly with a code example and was a bit disappointed. He then asked me if I can write an article about it. I said you should have read the Java concurrency in Practice book before the interview, that would have helped, but nonetheless, I liked the idea to just provide a quick overview of what is the happens-before relationship between threads in Java.

Sunday, June 28, 2020

Top 5 Courses and Books to learn Julia Programming language in 2020 - Best of Lot

Hello guys, if you are looking for a new, modern programming language to learn in 2020, then let me introduce you to Julia programming language. Julia is a high-level, high-performance dynamic programming language developed specifically for scientific computing, but it has uses in Big Data, Data Science, and other computing-intensive industries. Julia is actually designed to address the requirements of high-performance numerical and scientific computing while also being useful for general-purpose programming. Julia is also one of the most loved programming languages on StackOverFlow's Developer survey and created with the vision to take the best things from other popular mainstream programming languages.

10 Tips Improve Your Speed in Bash, and Linux Command Line

Have you ever amazed to see someone working very fast in UNIX, firing commands, and doing things quickly? Yes, I have noticed that a couple of times, and I have always inspired to learn from those superstar developers. In this article or tutorial or whatever you call it, I have dedicated to sharing some UNIX command practices I follow to work fast, quick, or efficiently in Linux. I work for the Financial services industry, and my work involves the development and support of online stock and futures trading applications in Electronic trading, Derivatives, etc. All our services run on Linux servers, so I need to work efficiently and quickly in the Linux machine, and that's how I have learned these productivity tips in Linux.

Saturday, June 27, 2020

Top 5 Courses to Crack Salesforce Platform App Builder Certification Exam - Best of Lot

Hello guys, Most people when they hear the word salesforce think about that famous CRM that manage and organize your company and get you more leads and so on, but the fact is that Salesforce is not just a CRM it is a huge platform that allows you also to build your own custom app, design dashboards, and deploy your app. And for this purposes, salesforce has launched a certificate called Salesforce platformer app builder certification which is what we are going to discuss in this article.

Top 5 courses to learn Pandas and Python Data Analysis in 2020 - Best of Lot

Pandas is one of the most potent and popular Python libraries for Data Analysis. It's also one of the favorite tools for Data Scientist because it helps them in cleaning, transformation, manipulation, and analysis of Data. To be honest, data in the real world is messy, and before you can start with your analysis, you need to clean and transform the data in the format you want. A tool or library like Pandas really helps there. That's why it's essential to learn about Pandas while doing Data Analysis with Python. It's even more critical if you are in the field of Data Science and Data Analysis. If you know Paands, well and good, but if you don't nevermind, as I am going to share some of the best online courses to learn Pandas and Data Analysis with Python in 2020.

Friday, June 26, 2020

Difference between Dependency Injection and Factory Design Pattern in Java Spring

Learning a Programming language like Java or Python is easy, but writing production-quality code is difficult. Coding is as much art the Science behind it. To write good code, you need to carefully design your classes, their dependency, and how to use that. This is important so that it can survive the constant change throughout his lifetime. If you have been coding for some time, then you know that SOLID principles and Design Patterns help you to write better code. This is obvious because they are proven the solution to some common problems software developers face all around the world. But, knowing just the design pattern is not enough, you also need to learn using the right design pattern in the right place.

Thursday, June 25, 2020

Can you Learn Coding and Web Development in the 40s and 50s?

Yesterday, I was speaking to one of my friends who were not from the programming background but working as a teacher in a college of Engineering and Technology in the countryside of India. He just turned 40, and he is also the father of two wonderful kids. He has been teaching Maths to B.Tech students in a private engineer college for the last 15 years. He is earning Ok, but he always wanted to explore the world, and he now realizes that a Programming job can provide him that opportunity, so he contacted me to find out whether it's too late for a Programming career.