Sunday, April 18, 2021

Top 5 Courses to Learn Redhat OpenShift in 2021 - Best of Lot

Hello guys, if you want to learn the RedHat Openshift platform and looking for the best Openshift courses then you have come to the right place. In the past, I have shared the best Docker and Kubernetes courses and in this article, I am going to share the best Openshift courses to join in 2021. if you are in the DevOps space, then you might have heard about Openshift. I didn't know about Openshift but have to learn when I had to work on a Spring boot project, which is deployed on the OpenShift Platform. Don't worry, it's not a very complicated thing to learn, and if you have used Docker and Kubernetes in past then you will appreciate what Openshift brings to the table.

Saturday, April 17, 2021

Review of Udemy Best React Complete Guide Course by AcadMind and Maximillian Schwarzmuller

If you want to learn React.js and looking for the best online course to join or want to learn more about React - The Complete Guide Udemy course then you have come to the right place. Earlier, I have shared the best React and Redux courses and in this article, I am going to review, Udemy's best React course, React - The Complete Guide (incl Hooks, React Router, Redux) by Maximillian Schwarzmuller and AcadMind. This 72-hour long course is one of the best resources for people wanting to learn to React and Max has just re-recorded all lessons making it the most up-to-date course to learn to React.js library in 2021. 

Friday, April 16, 2021

Top 10 Java ConcurrentHashMap Interview Questions with Answers [UPDATED]

The ConcurrentHashMap class part of concurrent collections package added on JDK 1.5 which contains utility classes like BlockingQueue, CopyOnWriteArrayList, CopyOnWriteArraySet etc. It is a replacement of synchronized hash-based map implementations e.g. Hashtable and synchronized HashMap. It implements Map and ConcurrentMap (a sub-interface of Map) interface which allows you to store key-value pairs. The class is similar to HashMap or Hashtable but it's more scalable and the right fit for concurrent Java application. Unlike Hashtable which achieves its thread-safety by compromising the scalability, ConcurrentHashMap uses advanced techniques e.g. dividing the map into segments to remain thread-safe and scalable at the same time.

Top 5 Courses to improve Coding and Refactoring skills for Experienced Java Programmers - Best of Lot

Hello guys, if you want to improve your coding skills, learn to refactor, and other coding best practices,  and looking for the best online courses to improve your coding skills, refactoring, and other best practices then you have come to the right place. Earlier, I have shared the best design pattern courses and best Data Structure and Algorithms courses, and today, I am going to share the best online courses you can join to improve your coding and programming skills. Coding skill is one of the most important differentiators when it comes to getting a programming job. It's simple, if you can't code, you can't go up the ladder and you can't get better jobs. 

Thursday, April 15, 2021

Java 9 Factory Methods for Collections Example - Creating Unmodifiable List, Set, and Map

Hello guys, this is my first article in Java 9 features on this blog, and today you'll learn about my favorite feature "factory methods for collection", which is introduced as part of JEP 269. The JEP stands for the JDK enhancement proposal. If you have worked in Groovy or Kotlin then you know that how easy is to create the list with elements using collection literals e.g. to create a list of 1, 2, 3 you can simply write val items = listOf(1, 2, 3). Unfortunately, Java doesn't support that yet but things have been improved with the factory methods for collection in JDK 9 and it's almost like that. JDK has added static factory methods like of() on to basic Collection interfaces which you can use to create a list of items.

5 Best Online Courses to Learn Data Structure and Algorithms in Python [2021]

Hello guys, if you want to learn Data structure and Algorithms in the Python Programming language and looking for the best online courses then you have come to the right place. In the past, I have shared a lot of useful resources like free data structure courses, books, and tutorials to learn Data Structure and Algorithms for programmers. I have also shared a lot of Algorithmic interview questions and their solutions in Java, but I have been constantly getting queries about good courses to learn Data Structure and Algorithms in Python. Even though the topics are completely independent of the programming language, Python developers definitely like the courses and books which teach Data Structure and Algorithms in Python.

Wednesday, April 14, 2021

How to Create an Array of Prime numbers in Java [ Sieve of Eratosthenes Algorithm Example]

Hello guys, I have said many times that a good knowledge of Data Structure and Algorithms is the first step towards becoming a better programmer and that's why I share a lot of Data structure and Algorithm stuff in this blog. To continue the tradition, I am going to share an interesting algorithm today, The Sieve of Eratosthenes algorithm, which can be used to generate prime numbers up to a given number. There are many occasions when you need to generate all prime numbers up to a specified integer and one algorithm which is most often used to generate prime numbers is the Sieve of Eratosthenes Algorithm. Surprisingly, not many developers know about this algorithm, particularly Java programmers, which is mainly because of not doing enough competitive programming.

The Complete Python Developer in 2021:Zero to Mastery by Andrei Neagoie [Udemy Course Review]

Hello guys, if you want to learn Python in 2021 and looking to join The Complete Python Developer in 2021:Zero to Mastery course by Andrei Neagoie on Udemy or ZTM Academy but not sure then you have come to the right place. Earlier, we have shared the best Python 3 Courses to join in 2021 and today's article covers a review of one of the best online courses to learn the python programming language in 2021 for absolute beginners with no prior experience needed to start. This is a comprehensive course with almost 31 hours of content and also one of the most up-to-date courses to learn Python on Udemy. 

Tuesday, April 13, 2021

Top 10 Udemy Courses You can on Sale in 2021 - Best of Lot

Hello guys, Udemy, one of the most popular online learning platforms is known for its sale where you can buy a $200 course for just $10, and they are running a sale again. It's actually a good time to buy some quality courses as you won't get another chance to buy the course at a price as low as $9.9 but the big question which courses should you buy on Udemy sale? Well, I always buy courses from the reputed instructor and something which teach an evergreen and in-demand skill like Java, Python, Microservices, Docker, Kubernetes, and AWS. I generally buy a lot of courses in Udemy sales and then access them whenever I need them. Though, I must warn you Udemy is addictive and I often buy more courses than I need, so beware of that and buy courses which you need now or in near future.  

Review of Coursera's Deep Learning Certification By Andrew Ng - Is it worth it?

Hello guys, if you are looking for the best Deep learning course online or thinking to join Deep Learning Specialization by Andrew Ng on Coursera but thinking whether it's worth your time and money or not then you have come to the right place. Earlier, I have shared the best Coursera courses for Data Science,  Machine Learning, and Python Programming, and today, I will review one of the most popular Deep Learning specializations on Coursera or should I say on the internet, The Deep Learning Specialization by Andrew Ng and his team, offered by deeplearning.ai. While there are many Deep learning courses available online, this is by far the most detailed and comprehensive, yet engaging course on deep learning. 

Monday, April 12, 2021

Top 5 Courses to Learn JIRA for Beginners and Experienced Developers - Best of Lot

Hello guys, If you are working in Agile projects then you must have come across JIRA, one of the most popular tools for planning, project management, and bug tracking. Almost all the software companies 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 books and  In this article, I am going to share the best courses to learn JIRA online for both beginners and experienced developers.

Sunday, April 11, 2021

Top 5 Essential Skills to Crack Coding Interviews in 2021

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 essential skills which matter 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?

250+ Questions for Java SE 11 Developer Certification [1Z0-819] - My New Udemy Course

Hello guys, I am very excited to announce the release of my new Udemy course, 2021 Java SE 11 Certification Practice Tests for the 1Z0-819 exam. This is one of my dream projects which I have been working on since last year and one of the 3 goals I had set up for this year, along with Grokking the Spring Boot Interview and Grokking the Java Interview. This is also my first Java course on Udemy. The course is a practice test that contains more than 250+ practice questions to prepare for Java SE 11 Developer certification or 1Z0-819 exam. If you are preparing for this certification then you can use these practice tests to check your preparation level, find your strong and weak areas and work upon them. 

Saturday, April 10, 2021

5 Projects You Can Build to Learn React.js in 2021 - Best of Lot

Hello guys, if you are self-learning React.js and looking for some project ideas to hone your React skills then you have come to the right place. Earlier, I have shared the best websites, courses, roadmap, and books to learn Reactjs, and today, I am going to share the best React.js projects you can build to improve your React skills. These projects are mainly for beginners who are learning React.js but even intermediate developers can use these project ideas to create some fun projects.  Learning web development and new technologies is not easy and react js is one of them. Just completing an online course about react doesn’t make you a professional web developer until you test your knowledge by creating multiple projects so you take advantage of its features for learning purposes.

Friday, April 9, 2021

Top 5 Online Courses to Learn Vue.js in 2021 - Best of Lot

Hello frontend and full-stack developers, if you want to use Vue.js for your next project and looking to learn Vue.js online and looking for the best Vue.js resources then you have come to the right website. In the past, I have shared the best React courses and best Angular courses and today, I am going to share the best Vue.js courses, both free and paid for beginners and intermediate developers. These are the best Vue courses from sites like Udemy, Pluralsight, and Educative and created by experts, and thousands of frontend developers have already enrolled to learn Vue.js online. They are also very affordable and you can buy most of them for under $15. But, before looking into these awesome Vue.js courses, let's learn a bit more about Vue.js and why you should learn Vue.js in 2021. 

Thursday, April 8, 2021

Review of Udemy's Machine Learning A-Z - Hands-On Python and R in Data Science - Is it worth it?

Hello there, If you want to learn Machine Learning and thinking whether Udemy's  Machine Learning A-Z - Hands-On Python and R in Data Science  online course is worth it nor then you have come to the right place. In this article, I have reviewed Udemy's Machine Learning A-Z - Hands-On Python and R in Data Science by Kirill Eremenko and Hadelin De Ponteves. Honestly, this is one of the best Machine Learning courses you can get at an affordable price and is suitable for both beginners and intermediate programmers and people who want to pursue Machine Learning. If you are in hurry, I suggest you join the course but if you have some time then stay and read the full review to make an informed decision. 

Top 5 Spring Boot Features Java Developers should Learn

You might have heard about Spring Boot and its magical powers about creating a Spring Web application in just under 140 characters which can be written in a tweet, but what that really mean? 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.

Wednesday, April 7, 2021

10 Best Udemy Courses to Learn Python Programming in 2021

Hello guys, If you want to learn Python programming and looking for the best Udemy courses to learn Python online, then you have come to the right place. Earlier, I have shared the best Python courses and free Python courses for both beginners and experienced Python developers but In this article, I am going to share the top 10 Udemy courses to learn Python in 2021. This includes both hands-on and project-based courses where you will learn by doing, I mean you will actually build the projects using Python. This is the best approach to learn any new technology or skill, including Python. By the way, when it comes to learning online, Udemy is my go-to place becuase of affordable pricing and some high-quality courses.

For Gumroad Day, my Java and Spring Books are 'Pay What You Want', $1 minimum [TODAY ONLY]

Hello guys, just wanted to write a short post about the Gumroad sale and the once-in-a-lifetime opportunity to buy my books for just 1$ (minimum).  For #GumroadDay, both my books, Grokking the Java Interview and Grokking the Spring Boot Interview are 'Pay What You Want, $1 minimum. Today only.

- Grokking the Java Interview, $19.9 (normal price)
- Grokking the Spring Bot Interview, $19.9 (normal price)

More than 580+ Java developers have bought so far. Go see what they look like!

Tuesday, April 6, 2021

Top 5 Course to Crack Google's Associate Cloud Engineer Certification Exam - Best of Lot

Hello guys, If you are looking to pursue a career as a Google Cloud Engineer or merely just want to acquire a cloud certificate to add to your colorful resume, then taking the Google Cloud Engineer exam might be just the right thing for you. Google Cloud Platform or GCP is one of the top 3 public cloud providers along with AWS and Microsoft Azure and the demand for certified Google cloud professionals is growing exponentaitonal because of increased adoption of the Google Cloud Platform. If you already have a fair amount of experience, then you may want to go for the Professional Cloud exam. But if you are a newbie, or looking to add more certifications to add your CV then the Associate Cloud Engineer exam is the way to go.

Top 5 Tools for Testing REST APIs and RESTful Web Services - Best of Lot

Hello guys, If you are a Java or web developer working on REST APIs and RESTful web services and looking for some tools to test your APIs and web services then you have come to the right place. Earlier, I have shared the best books and courses for RESTful web services and in this article, I am going to share five awesome but easily accessible and free tools to test your REST APIs. These REST API testing tools will help you to test your APIs as you build, starting from unit testing to integration testing and then fully automating your resting to create a regression pack. You can also use these tools to interact with your REST API during the development phase for quick tests. 

Monday, April 5, 2021

Top 10 Courses to learn PHP for Beginners in 2021 - Best of Lot

Hello guys, if you want to learn PHP, MySQL, Laravel, and looking for the best PHP courses then you have come to the right place. Earlier, I have shared some best WordPress courses, one of the most popular PHP applications, and free PHP and MySQL courses and in this article, I am going to share the best online courses to learn PHP for beginners. Some people have the desire to learn web development but they get confused about which programming language should they pick in a world full of programming languages. But, when it comes to choosing a simple programming language for web development then PHP is a great choice and also one of the most popular server-side programming languages. 

Top 20 JUnit Interview Questions with Answers [Java Unit Testing]

Hello guys, if you are preparing for a Java programming interview and looking for some JUnit and testing interview questions then you have come to the right place. Earlier, I have shared the best JUnit and TDD courses and books, and, today, I am going to share some JUnit interview questions for Java developers. There is no doubt that JUnit is the defacto standard framework for writing unit tests in Java and every professional developer must be familiar with JUnit. Not long ago, you can clear Java interviews without writing a single line of code, forget about tests but not many more. More and more companies are including coding tests and take-home tests where you need to build solutions and write code with tests on their hiring process. 

Sunday, April 4, 2021

Top 5 Online Courses to Learn Modules and Java 9 Features - Best of Lot

The last couple of years was the year of releases for Java developers. With versions of JDK 9 to JDK 15, Spring 5, Spring Boot 2.0, and Spring Security 5.0, there was so much to learn for Java developers and all at once, but like many others, I didn't make a good process, and I am looking to turn it around this year. One of my top priority goals for this year is to learn new Java features as quickly as possible to write more about them. It's also essential for you to learn modern Java features to write better code and improve your day-to-day productivity with Java. The Java 9 release intends to change the way Java developers used to write code. It introduces a modular JDK so that developers can only include the modules that they need.

Top 22 Spring Interview Questions Answers for Java Programmers [UPDATED]

Hey Java Programmers, if you are preparing for a Java developer interview then you should pay special attention to Spring framework-related questions. Spring framework interview questions are on the rise on Java web development and core Java interviews.  This is obvious given Spring Framework is the best most popular framework available for Java application development and now Spring IOC container and Spring MVC framework are used as a de-facto framework for all new Java development. Because of its popularity,  interview questions from the spring framework are top on any list of Java Interview questions and you should also prepare different Spring topics like Spring Boot, Spring Data JPA, Spring Security, Testing and Spring Cloud, etc to do well on Java developer interviews. 

Saturday, April 3, 2021

Top 6 Courses to learn Reactive Spring Boot and WebFlux in 2021- Best of Lot

Hello Java programmers, if you want to learn Reactive Programming with Spring Boot and WebFlux, and looking for some online courses to start with then you have come to the right place. Earlier, I have shared the best Spring Courses and best Spring Boot courses and today, I am going to share the best online course to learn Reactive Programming with Spring Boot and Web Flux. In recent times, Reactive programming has become very popular. It is a programming paradigm that focuses on an asynchronous, event-driven, non-blocking approach for processing data which paves for writing a next-generation scalable web application in Java. 

Friday, April 2, 2021

Difference between @Autowired and @Inject annotation in Spring?

What is the difference between @Autowired and @Inject annotation in Spring is one of the frequently asked Spring questions on Java interviews? Since everybody is now moved or moving to annotation-driven and Java configuration in Spring, this question has become even more important for prospective candidates looking for a Java web development job using the Spring framework. The @Autowired annotation is used for auto-wiring in the Spring framework. If you don't know, autowiring is a process on which the Spring framework figure out the dependencies of a Spring bean, instead of you, a developer, explicitly specifying them in the application context file. You can annotate fields and constructor using @Autowired to tell Spring framework to find dependencies for you.

Top 10 Online Courses to learn Ruby on Rails for Beginners - Best of Lot

If you want to learn Ruby Programming language or Ruby on Rails, a leading web development framework then you have come to the right place. Earlier, I have shared the best Python 3 courses and books, and today, I am going to share the best Ruby and Rails course for beginners. A danish student calls himself DHH (David Heinemeier Hansson) have created a new framework that makes web development more than easy even if you don’t have that many skills in programming and one year later twitter have adopted that language and added it to their website and you may be now guessed what is that framework. Well, it is known as Ruby on Rails.

Thursday, April 1, 2021

Top 5 Online training courses to learn Cloud Computing in 2021 - Best of Lot

Cloud Computing is becoming an essential skill for any Software developer or IT professional today as more and more companies are moving towards Cloud for their infrastructure and service needs. It pays to learn Cloud Computing today as the most likely application will be solely building and deploy in the cloud in the future. No matter what your role is, if you are working in technology, cloud computing is going to affect you, one way or another. Anyway, if you want to learn cloud computing then you have come to the right place, in this article, I am going to share some of the best courses to learn Cloud computing basics in general and with AWS and GCP in particular.

Difference between BeanFactory and ApplicationContext in Spring framework

The difference between BeanFactory and ApplicationContext in Spring framework is another frequently asked Spring interview question mostly asked Java programmers with 2 to 4 years experience in Java and Spring. Both BeanFactory and ApplicationContext provide a way to get a bean from the Spring IOC container by calling getBean("bean name"), but there is some difference in their working and features provided by them. One difference between the bean factory and application context is that the former only instantiates bean when you call getBean() method while ApplicationContext instantiates Singleton bean when the container is started,  It doesn't wait for the getBean to be called.