Top 7 Free Git Courses for Programmers to Learn Online in 2025 - Best of Lot

One of my goals is to learn and master Git and GitHub this year and I have been searching for some good tutorials and courses to start with. The Internet is full of git tutorials and a simple Google search will leave you thousands of tutorials but the big question mark is where do you start? It's easy to pick a tutorial or a blog post if you have some background about what is Git, what it does? and how to use it but if you don't have much background then you need a course that can tell you all the information from the ground up. I personally like learning from a book or an online course before moving to blog posts as they were often well structured.

Top 10 DevOps Courses for Experienced Programmers to Learn Online in 2025 - Best of Lot

DevOps is really hot at this moment, and many job opportunities are lying for distinguished engineers and DevOps professionals. If you are an experienced Java programmer and want to become a DevOps engineer, then you have come to the right place. In this article, I am going to share some of the best online training courses you can take to become a DevOps professional. The most crucial advantage of DevOps is that it helps you to deliver better software and provide more control over your environment and software development process with the help of modern tools and automation. That's the reason the demand for DevOps professionals is growing exponentially. It's also one of the high-paying jobs along with Data Science and Machine learning specialists.

Top 8 Courses to Crack AZ-900: Microsoft Azure Fundamentals Cloud Certification in 2025 - Best of Lot

Hello Guys, you may know that Cloud computing is becoming more and more critical, and it's almost mandatory for both technical and non-tech IT people to know about Cloud computing and different Cloud platforms like AWS, Azure, and GCP. You just can't hide with Cloud anymore, you need to learn it to understand and master it to stay relevant in technology jobs. Thankfully there is a lot of learning material available to learn about the benefits of Cloud and why companies should move to Cloud. Still, certifications are probably the best way to develop knowledge, skill, and get the recognition required by many Cloud jobs. If you are just getting started with Cloud Computing and Cloud platforms like Microsoft Azure, then Microsoft Azure Fundamentals (AZ-900) is probably the best certification to build foundational Cloud skills and also get recognition.

Top 6 Course to Crack Azure Administrator Associate Certification Exam AZ-104 in 2025 - Best of Lot

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 a 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 in demand. If you are preparing for Azure Administrator certification you need to pass AZ-104 exam by Microsoft. This is a completely online exam which you can give on any Microsoft exam center. 

Top 7 AWS Solution Architect Associate Certification Practice Test and SAA-C03 Exam Dumps in 2025

Hello guys, if you are preparing for the AWS Certified Solutions Architect Associate (SAA-C03 and SAA-C03) 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 to share the best Practice test and questions to prepare for the AWS Solution Architect Associate  (SAA-C03) exam from Udemy, Whizlabs, and other portals, totaling more than 2000+ practice questions. These practice tests are created by AWS experts and certified developers and Solution architects like Stephane Maarek and Cloud guru Ryan Kroonenberg. Mock simulators play an important role in any certification and the AWS Solution Architect Associate-level exam is no different.

How to find Square root of integer in Java without using any Library? Interview Question

Problem : Given an integer i, find square root of it, without using Math.sqrt() method. Your method should return square root if given number is perfect square otherwise return floor(sqrt(x));

For example, 

Input i = 16

Output : 4

Input i = 17

Output : 4

This is very interesting problem and asked both freshers and experienced programmers. I have seen this question on many companies including ANZ, Barclays, and Citibank.

How to print Floyd's Triangle in Java? Example Tutorial

There are lots of programming exercises in Java, which involve printing a particular pattern in the console, one of them is printing the Floyd triangle in the console. In the Floyd triangle, there are n integers in the nth row and a total of (n(n+1))/2 integers in n rows. This is one of the most simple patterns to print but helpful in learning how to create other more complex patterns. The key to develop patterns is using nested loops and methods like System.out.print() and println() appropriately. Actually, pattern-based programming tasks are originally designed to master loops in programming.

How to Check if two Rectangles Overlap in Java? Collision Detection Solution and Example

Can you write a Java program to check if two rectangles are overlapping with each other or not? is one of the frequently asked coding questions on tech giants like Facebook, Amazon, Microsoft, and others. This is also a kind of problem where it's easy to find opposite or negative conditions like when rectangles are not overlapping and then inverting the result to prove that rectangles are colliding with each other. I first heard about this problem from one of my friends who were in the Android game development space. He was asked to write an algorithm to find if given rectangles are intersecting or not.

Top 5 AWS Certified Cloud Practitioner Exam (CLF-C02) Practice Questions & Dumps in 2025

As I have said before, Practice tests and exam dumps play an important role in not just passing the AWS Certified Cloud Practitioner certification (CLF-C02)  but also achieving a high score, which can truly set you apart from your competition. There are multiple benefits of going through practice tests and solving problems on an exam simulator before actual example. For example, it will help you find your strengths and weakness in advance so that you can understand your weaker areas better. They also help you to develop speed and accuracy, which is key to pass the time-bound exam like the AWS Certified Cloud Practitioner (CLF-C02) certification from Amazon.

Top 5 Course to Crack Microsoft Azure Developer Associate Certification Exam AZ-204 in 2025 - 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 enable 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.

Top 5 Courses to Crack Azure Solutions Architect Expert Certification (AZ 305) Exam in 2025 [UPDATED]

The Azure cloud solutions from Microsoft are quickly becoming the go-to Cloud platform for many companies. While AWS leads the retail space, and Google Cloud Platform is still in the middle, Microsoft's Azure has emerged as a winner by attracting both big and small companies into its Cloud platform. This means the demand for people familiar with Azure architecture and Azure Cloud products and services is rising and providing some excellent career opportunities for Developers and DevOps who are interested in Cloud Computing. It's also very rewarding; the average salary for Azure Solution Architect in silicon valley is around 145,000 USD, which is highly competitive. It's one of the highest-paying technology jobs.  In short, Azure is currently presenting an excellent opportunity for senior developers.

Top 5 Courses to learn Quarkus and Micronaut for Java Programmers in 2025 - Best of Lot

Hello Java Programmers, Microservices is quickly becoming standard way to build and deploy Java application on Cloud and that's why its very important for Java programmers to learn about popular Microservice development frameworks in Java. If you want to create Microservices in Java and want to explore Microservices frameworks like DropWizard, MicroNaut, and Quarkus, you have come to the right place. In the past, I have shared the best Microsercies courses with Spring Boot and Spring Cloud, and today, I will share the best online lessons to learn Dropwizard and Micronauts. These are the best online courses and tutorials you can get to know this helpful technology. Unfortunately, not many online courses are available, but API docs and guides are also handy; along with these courses, you can read them.

Linux Command to Find how Long a process is Running in UNIX - Example

Hello guys, today, I am going to share one of the useful tips to find out how long a particular process is running in Linux. This is very useful while you are troubleshooting an issue and want to know whether your process or service is restarted fine on a daily or weekly basis. So you checked your process is running in Linux operating system and it's running fine, by using ps command. But now you want to know, from how long process is running, what is the start date of that process etc. Unfortunately, PS command in Linux or any UNIX based operating system doesn't provide that information.

Difference between FileInputStream and FileReader in Java | InputStream vs Reader Example

Before going to explain specific difference between FileInputStream and FileReader in Java, I would like to state fundamental difference between an InputStream and a Reader in Java, and when to use InputStream and when to go for Reader. Actually, Both InputStream and Reader are abstractions to read data from source, which can be either file or socket, but main difference between them is, InputStream is used to read binary data, while Reader is used to read text data, precisely Unicode characters.

4 Ways to Convert String to long in Java? Example Tutorial

How to convert a string to long in Java is one of those frequently asked questions by a beginner who has started learning Java programming language and is not aware of how to convert from one data type to another. Converting String to long is similar to converting String to Integer in Java, in-fact if you know how to convert String to Integer then you can convert String to Long by following the same procedure. Though you need to remember few things while dealing with long and String first of all long is the primitive type which is wrapped by the Long wrapper class and String is an Object in Java backed by character array.

How to Count Negative Numbers in a Sorted Matrix? [Solved] (Amazon Coding Question)

Hello guys, earlier I shared a list of Google Coding Interview questions, and today, I am going to share with you an interesting coding problem which was asked on Amazon, how to count total negative numbers in a given matrix where rows and columns are sorted in increasing order. Again, I found this coding problem while surfing on the internet, It wasn't actually asked to me or my reader, so I can't vouch that it's actually an Amazon Interview question. Though, I really expect it to be because it's an interesting problem and the optimal solution is not so easy but with the internet, you never know.

Top 7 Free Java Courses for Beginners to Learn Online in 2025 - Best of Lot

We all love free resources, don't we? If you want to learn Java online in 2025 and looking for the best free core Java online courses then you have come to the right place. Earlier, I have shared the best Java courses for beginners and in this article, I am going to share the best free courses to learn Java online. There was a time when I buy a lot of books when I was preparing for my engineering entrance exam but I only ended up buying books not reading them. After that, I changed my habit to first try to read a book on loan or try free resources and only buy when I really need them. When I started my programming journey, mostly I learn from free resources like free courses and books and there I developed the passion to collect free resources as well. 

Top 5 Practice Tests for AWS Certified Developer Associate DVA-C02 Certification in 2025 - Best of Lot

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 constraints but also reinforce 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 Neal Davis' AWS course on Udemy or Stephane Maarek's DVA-C02 course, unless and until you have practiced enough problems, you are not really ready for the exam.

Top 7 Data Science and Machine Learning Courses to Learn Online in 2025 - Best of Lot

Many programmers and Computer Science graduates are moving towards Data Science and Machine learning hoping for better pay and career opportunity and there is a reason for it. Data Scientist and Machine Learning Specialist have been ranked the number one job on Glassdoor for the last couple of years and the average salary of a data scientist is over $120,000 in the United States according to Indeed. Data Science is not only a rewarding career in terms of money but also provides the opportunity to solve some of the world's most interesting problems.  IMHO, that's the main motivation many good programmers are moving towards Data Science, Machine Learning, and Artificial Intelligence.

Top 5 Course to Crack AWS Solution Architect Professional (SAP-C02) Certification Exam in 2025 - Best of Lot

Hello guys, today, I am going to talk about the toughest AWS certification and probably one of the toughest Cloud certifications as well, yes, you guessed it right. I am talking about the AWS Solution Architect - Professional certification. This is not just the toughest but also most desired and reputed cloud certification and not many developers and system admin can pass it. It's slightly easier to pass the AWS Solution Architect- Associate exam but this one is a completely different nut to crack. You would need an in-depth knowledge of not just cloud computing but also many essential AWS services to crack this coveted certification. 

Java Program to find factorial of number in Java - Example Tutorial

How to find the factorial of a number in Java in both recursive and iterative ways is a common Java interview question mostly asked at the fresher level. It’s not just popular in Java interviews but also in other programming languages like C or C++. It's also famous  In our last article we have seen how to check if a number is prime or not and in this Java programming tutorial, we will see a simple Java program to find the factorial of a number in Java by using recursion and iteration. The same program can also be used to print factorial of any number or print a range of factorial as well.

Top 7 Spring MVC Online Courses for Beginners in 2025 - Best of Lot

Hello guy, Many of you have been asking me about the best online courses to learn Reactive Spring, Spring Boot, and Spring MVC. I have shared the best Spring Boot courses in the past, and today I will share the best courses to learn Spring MVC. Many Java developers think that Spring MVC is the same as Spring Framework, which confuses them. In this article, I'll try to answer than questions and share some of the best courses to learn Spring MVC for Java developers. Both Spring Core and Spring MVC are part of the same umbrella, a more significant spring framework project, but they are not the same.

Top 6 Courses and Books to Learn Tailwind CSS for Beginners in 2025 - Best of Lot

Hello guys, if you want to learn Tailwind CSS and their utility class in 2025 and looking for the best online courses to learn Tailwind CSS then you have come to the right place. In the past, I have shared best courses to learn HTML and CSS and Bootstrap, another popular CSS framework and in this article, I will share best online courses for Tailwind CSS. If you don't know what is Tailwind CSS, let me give you a brief overview first. It's another utility framework which allows you to break your style into small reusable components. This prevent repetition and improves organization by creating CSS classes for every feature or section on the website instead of hogging all page space with one big style sheet that applies globally

Top 8 Courses to learn Pandas and Python Data Analysis for Beginners in 2025 - 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 scientists 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 Pandas, well and good, but if you don't mind, as I am going to share some of the best online courses to learn Pandas and Data Analysis with Python in 2025.

Top 5 Java 8 Certifications Courses to Prepare OCAJP (1Z0-808) Exam Online in 2025

If you are preparing for Oracle Certified Java SE 8 Associate exam, also known as OCAJP 8 and OCPJP 8 with exam codes 1Z0-808 and 1Z0-809 and looking for a decent online course to kick start with your preparation then you have come to the right place. In the past, I have shared Java 17 courses for 1Z0-829 certification and Java 11 courses for 1Z0-819 exam and In this article, I will share some of the best online courses to prepare for Java SE 8 certifications. Btw, first of all, configurations to make the right decision. If you are a Java developer then certifying for your skill will not only distinguish you from millions of other non-certified Java programmers but also improve your knowledge and understanding of Java SE 8. If you are looking for a job then this can help you to get a better job and if you are looking for career growth like becoming a senior Java developer, these certifications can help you to get a promotion.

Top 5 Online Courses to Crack AWS Certified Developer Associate Exam (DVA-C02) in 2025 - Best of Lot

Hello guys, you might have heard about AWS certifications and if you, as a Programmer, Software Developer, or DevOps Engineer, wondering which certification to pursue in 2025, I would suggest going for AWS Developer Associate Certification by Amazon Web Service. The AWS Certified Developer - Associate examination is intended for Software Developers and Programmers who have one or more years of hands-on experience developing and maintaining an AWS-based application. Since the future of Software Development is in Cloud it makes sense for Software Developers to get certified for their cloud development skills and given that AWS is the most popular and biggest Cloud platform it makes sense to go for AWS Developer Associate certification.

Top 5 Udemy Course to Crack AWS Certified DevOps Engineer Professional Exam DOP-C02 in 2025 - Best of Lot

Do you want to become a DevOps engineer for cloud platforms like AWS but don't have a target, then you have come to the right place because today, I am going to talk about AWS Certified DevOps Engineer Professional Exam and share the best online courses to prepare well for this prestigious exam. While being a good developer is great and writing scalable codes is an asset, delivery time is very important in all IT projects as well, and that was what prompted the first DevOps day. DevOps is a combination of word development and operations which is the operations that lead to faster software development. Getting a certificate in DevOps enables professionals in IT to display their skills and qualifies them to be part of DevOps leaders.

How to check if array is a binary heap in Java? [Solved]

Problem : You have given an array of integer, check if the given array represents a binary max-heap data structure. In max heap every node is greater than all of its descendants. 

For example :

Input: array[] = {100, 25, 20, 17, 22, 12} 

Output: true

The given array represents below tree

100

/ \

25 20

/ \ /

17 22 12 

This binary tree follows max-heap property as every node is greater than all of its descendant. 

Top 7 Books and Udemy Online Courses to Crack the PMP Certification Exam in 2025 - Best of Lot

If you are in the Project management and People management area, then you might have heard about PMP certifications, one of the most reputed and sought-after IT certifications for project managers and people aspiring to start their career in project management. PMP is a short form of Project Management Professional and is offered by the Project Management Institute (PMI). As I said, it's one of the most reputed certifications for project management professionals. There is an immense global demand for project managers. Several leading and best companies hire certified project managers to manage their projects. According to a PMI report, over 2 million project management roles need to be filled every year.

Top 7 Udemy Courses for CompTIA A+ Certification in 2025 (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.

20 Best Coursera Professional Certificates for IT Professionals in 2025 [UPDATED]

Hello guys, If you are thinking of a career in Information Technology and Software Development in 2025 but lack a Computer Science degree or a Professional degree then you don't need to disappoint. Coursera's professional certificates can give you all the knowledge and credential to start a career in Information Technology. If you don't know, Coursera launched Professional Certificates recently which can help you get job-ready for an in-demand career field in less than a year. You can earn a career credential, apply your knowledge to hands-on projects that showcase your skills for employers and get access to career support resources.

10 Code Review Checklist and Best practices in Java

What to review while doing Code review
Code Review and Unit testing are some of the best development practices I always recommend, strive for, and enforce as much as possible. Even just by doing code review and Junit test case always offer positive results it can be improved a lot by constantly learning from our mistakes, others mistakes and by observing how others are doing it. I always try to get my code review done by someone with more technical and domain experience so that I can capture any domain-specific scenarios which have been missed during think through the process.

How to find the first element in Stream in Java 8? findFirst() Example

In Java 8, you can use the Stream.findFirst() method to get the first element of Stream in Java. This is a terminal operation and is often used after applying several intermediate operations e.g. filter, mapping, flattening, etc. For example, if you have a List of String and you want to find the first String whose length is greater than 10, you can use the findFirst() method along with stream() and filter() to get that String. The stream() method gets the Stream from a List, which then allows you to apply several useful methods defined in the java.util.Stream class like filter(), map(), flatMap() etc.

Top 10 Data Science Certification Courses for Python and R Developers in 2025 - Best of Lot

Hello guys, Data Science, Machine Learning, Deep Learning, and Artificial intelligence are really hot at this moment and offering a lucrative career to programmers with high pay and exciting work. It's an excellent opportunity for programmers who are willing to learn these new skills and upgrade themselves. It's also important from the job perspective because Robots and chatbots are getting smarter day by day, thanks to these technologies, and most likely will take over some of the jobs which many programmers do today. Hence, it's essential for software engineers and developers to upgrade themselves with these skills.

Top 5 Udemy Courses to Learn Artificial Intelligence in 2025 - Best of Lot

If you want to learn Artificial Intelligence in 2025 and looking for the best online courses then you have come to the right place. Earlier, I have shared the best Data Science courses and today, I am going to share the best courses to learn Artificial Intelligence in 2025. These are the best online courses for Artificial Intelligence or AI for beginners and curated from sites like Udemy, Pluralsight, and Coursera, three of the best online learning platforms. These courses have been created by experts like Andrew Ng, an AI pioneer and founder of Coursera, and trusted by thousands of programmers and non-technical people who want to learn AI.  You can also join them to learn Artificial Intelligence in 2025. 

Top 10 Coursera Certifications, Courses, and Specializations to Learn Essential Skills in 2025 - Best of Lot

Hello guys, if you are looking for the best Coursera courses, certification, and specialization to join in 2025 then you have come to the right place. In the last few articles I have shared the best Coursera courses to learn Python, Software Development, and Cloud Computing, and today, I will share the best Coursera courses, specializations, and certifications you can join in 2025. Taking online courses and certifications have become mandatory in order to have a professional and successful career and the process is similar to a college education just by staying at your home taking classes watching videos and passing the quizzes and done you are now officially certified and when it comes to the best platform to learn online no one can compete with Coursera.

10 Examples of Optional in Java 8

Null is bad, it can crash your program. Even its creator called it a billion-dollar mistake hence you should always try to avoid using nulls whenever you can. For example, you should not return a null String when you can return an empty String, similarly never return null collections when you can return an empty collection. I have shared many such tips in my earlier article, 10 tips to avoid NullPointerException and my reader liked that a lot. But, I wrote that article a couple of years ago when Java 8 was not around and there was no Optional, a new way to avoid NullPointerException in Java, but, things have changed now.

Why use SLF4J over Log4J for logging in Java? Example

Every Java programmers know that logging is critical for any Java application, especially server-side application, and many of them are already familiar with various logging libraries e.g. java.util.logging, Apache log4j, logback, but if you don't know about SLF4J, Simple logging facade for Java,  then it's time to learn and use SLF4J in your project. In this Java article, we will learn why using SLF4J is better than using log4j or java.util.logging. It’s been a long time, since I wrote 10 logging tips for Java programmer,I don’t remember anything I have writing about logging.

Top 10 Coursera Courses and Certifications to Learn Web Development in 2024 - Best of Lot

Hello guys, If someone asked me 10 years ago about how to learn web development and get a job I would more likely say that you have to go to college and get your Bachelor’s degree and then try to get a job or internship. In short, it was only possible to become a web developer by spending years on education and thousands of dollars, now the internet has changed the game nowadays. These days many online platforms like Coursera, Udemy, Pluralsight, CodeCademy, and Educative appeared to the world allowing people to take online training courses in almost any industry and web development is one of them. 

Top 6 Udemy Courses to Learn IntelliJ IDEA and Android Studio IDE for Beginners in 2025 [Best & FREE]

There is no doubt that IntelliJ IDEA is THE best IDE for Java development, even though Eclipse may still be probably used by more people because it's FREE, IntelliJ IDEA is the most feature-rich and complete IDE. The Android Studio, which is the official IDE for Android development in Java, is also based upon IntelliJ IDEA, which further cement its place as the IDE Java developer should learn. The only thing which stops many other Java developers and me from moving from IntelliJ IDEA in the past was the lack of resources. Since Eclipse was free from the start, there are tons of resources, like books, courses, and tutorials are available. 

Top 7 Free Udemy Courses to Learn Kubernetes for Beginners in 2025 - Best of Lot

Hello guys, DevOps is becoming an essential skill in today's Programming and Software Development world and Kubernetes is an important concept and tool for DevOps engineers. It takes container-based deployment to another level and allows you to manage it on the scale. You can use Kubernetes to scale your container environment or let Kubernetes do all the work for you by leveraging its auto-scaling feature. Many DevOps beginners think that Docker and Kubernetes are the same but they are not. Docker provides a container to deploy your application and commands to interact with those but container but Kubernetes is actually a container management technology, which decides how many containers are needed and deal with other management aspects.

How to replace NULL with Empty String in SQL Server? ISNULL() vs COALESCE() Examples

We often need to replace NULL values with empty String or blank in SQL e.g. while concatenating String. In SQL Server, when you concatenate a NULL String with another non-null String the result is NULL, which means you lose the information you already have. To prevent this, you can replace NULL with empty String while concatenating. There are two ways to replace NULL with blank values in SQL Server, function ISNULL(), and COALESCE(). Both functions replace the value you provide when the argument is NULL like ISNULL(column, '') will return empty String if the column value is NULL.

Top 5 Courses to Learn Python 3 in 2024 - Best of Lot

If you are a Programmer or a Computer Science graduate and thinking of learning Python in 2024, then you have come to the right place. In this article, I am going to share some of the best online courses to learn Python 3 in 2024. Python is one of the most popular programming languages, and it's used in many domains, like Web development, Automation, Data Science, Machine learning, etc. In recent years, Python has also become a default language for Data Science and Machine learning Projects, and that's another reason why many experienced programmers are learning Python in 2024.

10 Books Every Java Programmer Should Read - Best of Lot, Must Read

If you are a Java programmer and wondering what to read to improve your knowledge of Java and become a better Java developer, then you have come to the right place. In this article, I am going to share some of the best Java books ever written. In fact, this is my list of all-time great Java books. They have withstood the test of time and emerges as more and more successful years after years. It doesn't matter if you read them this year or reading them next year, you are always going to learn a lot, and that's why I call them all-time great books.

The OCAJP 1Z0-808 - Best Books and Mock Exams for Java 8 OCA Certification

From the last couple of months, I have been helping a few developers to prepare for Java 8 associate certification with exam code 1Z0-808, also known as OCAJP 8. From my experience, both for preparing for Sun certification and helping other developers to get Java certified, I can say that two keys to be successful in Oracle Java SE certification are choosing an excellent study guide/course and buying one or two top quality mock exam simulators. When I say success, it doesn't mean just passing the exam but scoring above 90% because passing score 65% is not very difficult to achieve and anybody can pass OCAJP 8 by just a couple of month of practice but to score 90% and above is not that easy, you need to prepare and prepare hard.

2 Books to Prepare Oracle Java Certification Exams - OCA and OCP Java SE 6,7, 8 OCPJP 8

There was a time when Sun Certification was very hot and programmers feel proud of being Sun Certified Java Professional(SCJP). After Oracle took over Sun in early 2010, it changed names of all the examination from SCJP to OCPJP or OCJP, and now OCA and OCP for Java SE 7 and Java SE 8. I see there is a lot of confusion among certification nowadays, but essentially they are of the same level at previous SCJP. Since Java gets new language features with every new release, subsequently a new certification title is introduced. I am not agreed with upgrading your Java certification with every release, it doesn't make much sense to me, but many programmers prefer to get certified and keep it updated.

Top 10 Free Java Programming Books, EBooks and PDF for Beginners and Experienced Programmers

Who doesn't like free stuff? Well, I do like and many Java programmers like me simply love free Java books, eBooks, and PDFs. Fortunately, the Internet is full of free books and eBooks but unfortunately, many of them are of not good quality. Most of the eBooks which are freely available either are sample chapters of popular Java programming books or they are simply old and out-of-date. In my last article, I have shared a lot of such books and the feedback was that most of them, even though they are good in the past, have simply not up to the mark. The search goes on and while browsing the net a couple of days back I hit the jackpot when I found these free Java books from O'Reilly.

5 Reasons to Use Composition over Inheritance in Java and OOP - Example

Favor composition over inheritance is one of the popular object-oriented design principles, which helps to create flexible and maintainable code in Java and other object-oriented languages. Many times I have seen people suggesting use composition instead of inheritance, in fact, my favorite books like Head First Design Patterns also advocate this design principle. The Head First books have their own way of explaining, why composition is better than inheritance, and though it's long it's quite interesting and informative. It was the first chapter of this book, which helped me a lot in understanding this key OOP concept. 

Difference between char, varchar, nchar and nvarchar data types in SQL Server? Example

What is the difference between char and varchar in SQL, followed by nchar and nvarchar, is one of the popular SQL interview questions, and surprisingly not every programmer knows this basic difference. If you go with the name, which you should, then you can figure out that char is a fixed-length data type while varchar should be a variable-length data type. Though all char, varchar, nchar, and nvarchar are used to store text or String data there are subtle differences between them. As I said char is fixed length, which means a variable or a column like Zipcode char(10) will take only 10 bytes to store data, including space.

Top 5 Books to Learn SQL and Database Design for Programmers and DBAs - Best of Lot

The database design and modeling are one of those topics which rarely get the attention they deserve, especially at the start of the project, but once things have gone out of hand, then everybody talks about them. Comments like - this database is designed poorly, the schema is not performing well, you cannot add a new column easily, etc. becomes very common. The most problem with database design is that it is mainly done by application developers like Java or C++ developer who knows SQL, but they are not the expert on how to design tables and schema. 

Top 5 Udemy Courses to learn D3.js for Data Visualization with JavaScript in 2025 - Best of Lot

If you have done any Data visualization work then you might have heard about D3 - one of the excellent JavaScript libraries, which allows you to create beautiful interactive data visualization for the web. It's prevalent among Data Scientists and Data Analysts who often need these visualizations and charts to present data insights to stakeholders and business people. If you are not familiar with D3, no need to worry because, In this article, I am going to share some of the awesome courses to learn D3 in 2025. These courses teach you the basics of data visualization with D3 by binding data to a web page’s elements and customizing the elements based on that very data. You will also learn how to build different kinds of charts like Bar charts, Pie charts, Mind maps, etc using D3.js

Top 7 Object Oriented Programming and Design Courses for Java Programmers in 2024 - Best of Lot

There is no doubt that Object-oriented programming is a pillar of software development and one of the reasons for the massive success of Java. Good knowledge of Object-oriented programming helps you to create better software. It also allows you to communicate your ideas better with your team members and fellow programmers. Despite being such an important technology, it's difficult to find programmers who understand OOP well. Many programmers just think that OOP is nothing more than Abstraction, Inheritance, Encapsulation, and Polymorphism, without genuinely understanding these concepts and mastering them.

Top 8 Courses to learn Microsoft Azure Cloud in 2024 - Best of Lot

Hello guys, if you want to learn about the Microsoft Azure Cloud Platform, you have come to the right place. In the past, I have shared the best courses to pass Azure Fundamentals, Azure Administrator, and Azure Architect certifications. Today, I will share the best online course to learn the Azure platform for Beginners. These are top-quality courses from expert trainers and instructors and are picked from Udemy, Coursera, and edX. You can use these courses to learn Microsoft Azure core services and prepare for different Microsoft Azure certifications like AZ-900, AZ-303, and AZ-20 Azure developer associate certification.

Observer design Pattern in Java with Real world code Example

Observer design pattern in Java is a fundamental core Java pattern where Observe watches for any change in state or property of Subject. For Example, Company updates all its shareholders for any decision they make here Company is Subject and Shareholders are Observers, any change in the policy of company and the Company notifies all its Shareholders or Observer. This was a simple real-world explanation of the Observer pattern. 

Top 8 Courses to learn Reactive Spring Boot and WebFlux in 2024 - Best of Lot

Hello Java programmers, if you want to learn Reactive Programming with Spring Boot and WebFlux and are looking for some online courses to start with, you have come to the right place. Earlier, I have shared the best Spring Courses and best Spring Boot courses, and today, I will 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.  This means a thorough knowledge of reactive programming is a must for creating scalable web applications, and that's why Java developers need to learn reactive programming. 

DesignGuru.io Review - Is Grokking Advanced System Design Interview Course Worth it?

Hello guys, Before I give my review of DesignGuru's Grokking Advanced System Design Interview course, let me tell you a little bit more about this course so that we are on the same page. As you must already know if you have ever gone through for a software engineering interview, system design questions are an integral part of the process. System design plays a very important part as it is considered more important than solving coding problems. And in order to impress your potential employers, you have to be able to show your real design skills and convince them that you are able to work with complex design systems.

Review - Is ByteByteGo System Design Interview Course by Alex Xu Really Worth it in 2024?

Hello guys, if you are preparing for System Design Interview in 2024 then you may have most likely come across names like ByteByteGo, Alex Xu or System Design Interview - An Insider Guide by Alex Xu, and if you are wondering what they are or you know about them but thinking whether ByteByteGo is worth it or not? then you have come to the right place. Yes, ByteByteGo is indeed worth considering for your System Design Interview preparation. because its created by Alex Xu, an expert with FAANG interview experience, the platform offers in-depth coverage of system design topics. The author's use of diagrams to explain concepts in detail enhances the learning experience. 

Review - Is Grokking the System Design interview Course on DesignGuru Worth it?

Hello guys,  we are here again today for another exciting topic to discuss. But today, we will not discuss something related to Java or any other language or spring boot. Today, we will discuss something that is immensely practical and has the potential to land you very high-paying jobs. Today we are going to review a course that focuses on System Design! System Design is crucial for coding interviews! And it's also one of the most challenging topics to master. I have shared the best System design courses for coding interviews and books in the past. Today, I will review one of the top system design courses for technical discussions, Grokking the System Design Interview by Design Gurus.