Review — Is tryExponet.com Good Place for System Design Interview Prep in 2025?

Hello guys, its every developer’s dream to get a SDE job on FAANG company. I dreamed it too and having gone through interview on Google, Microsoft and Amazon, I know a thing or two about these interviews.  Many developer fail these interview either because of data structures and algorithms or because of System Design. Even for experienced developer cracking a system design interview is not easy. It requires patience, perseverance and dedication to learn the intricacies of system design and acquire knowledge to crack interview.

Top 5 Udemy Courses to Learn Distributed Systems in 2025

Hello guys, Distributed systems are the backbone of modern applications, enabling scalability, fault tolerance, and high availability. Whether you’re building microservices, cloud applications, or real-time systems, understanding distributed systems is crucial. If you want to learn Distributed System in 2025 and looking for resources then you have come to the right place. Earlier, I have shared  best System Design Books, System Design Questions and best Places to learn System Design and in this article, I am going to share best Distributed System courses from Udemy, one of my favorite place to learn programming and technical stuff. 

Is System Design Interview Inside Guide Vol 1 and 2 Book Worth Reading in 2025? Review

 Hello guys, if you are preparing for System design interviews or Software Design Interviews, then you must have come across System Design Interview - An Insider's Guide by Alex Xu, one of the most popular book on System Design after Designing Data-Intensive Applications by Martin Kleppmann. I first come across Alex Xu on Twitter when one of his image about how HTTPS works went viral. The image was quite detailed and presentable so I start following Alex and then I come across ByteByteGo, his online System design course and his book System Design Interview - An Insider's Guide. 

Top 5 System Design and Coding Interview Substack Newsletters in 2025

Hello guys, if you want to learn System design then there are many ways you can start. For example, you can start with reading a System Design book, or joining an online course, but if you want to keep yourself updated and believe in constant learning then there is no better way then subscribing to a System Design Newsletter. When it comes to System design newsletter you can find many newsletter online, just open your LinkedIn and you will see a post popping here or there but you cannot subscribe to all of them as it doesn't make sense. A better strategy is to subscribe only the best newsletters so that you doesn't get overwhelmed but also keep learning useful concepts and new tech trends. 

Top 10 Free Core Spring, Spring MVC, and Spring Boot Courses for Beginners in 2025 - Best of Lot

Hello guys, if you want to learn Spring Framework, Spring MVC and Spring Boot then you are at the right place. In this post you will find the best free courses to learn Spring Framework, Spring MVC and Spring Boot in 2025. I have been sharing a lot of resources like books and courses recently and when I published my list of Top 5 courses to learn Spring and Hibernate, many of my readers asked about a similar list of free courses to learn Spring Framework like Core Spring, Spring MVC, Spring Security, and Spring Boot. That request was always back in my mind but I couldn't get time to put together a list, which I can share with you guys, but today is the day. In this list, I have compiled some of the best online free courses to learn Spring Framework from scratch, online at your own pace. 

10 Best System Design Interview Courses for Software Engineers in 2025

Hello guys, if you are preparing for System design interview and looking for best online courses to learn essential System design concepts like load balancing, API Gateway, scalability, Microservices architecture as well as learn how to solve popular System design questions like how to design YouTube, WhatsApp, Parking Lot, Library System as well when to use NoSQL and SQL then you have come to the right place. 

 In the past, I have shared best System Design Books, Free System design courses,  System design prep guide, and System Interview Questions and in this article, I am going to share best System Design Courses for beginners and experienced Software Engineer to level up their System Design skills in 2025. 

3 ways to Learn Java Programming in 2025? Books, Courses, and Projects

Hello guys, if you want to learn Java and wondering what is the best way to learn Java in 2025 then you have come to the right place. In the past, I have shared many useful resources to learn Java programming and development like the 2025 Java Developer RoadMap, best Java courses, best Java books, and this list of best websites to learn Java for FREE, and in this article, I will tell you the best way to learn Java in 2025. Learning Java programming is quite rewarding and I can say that it was my best decision to learn Java 20 years ago. It opens doors to many opportunities in software development and lucrative jobs like Java developers on Investment banks like JP Morgan, UBS, Citibank, Barclays, and more. 

Top 10 Online Courses to Learn Python in 2025 - Best of Lot

Hello guys, if you want to learn Python programming language in 2025 and are looking for the best Python courses, you have come right. There are a lot of resources to learn Python on the web, including free and paid. In the past, I have also shared a lot of accessible sources like free books,  tutorials, courses, specialization, and certifications. Still, many of you asked for more comprehensive and advanced Python courses to master this essential programming skill in 2025. We have selected a few advanced Python online training courses from platforms like Udemy, Coursera, edX, ZTM Academy, and Pluralsight to help you learn Python from the best resources. 

10 Best Udemy Courses of Stephen Grider to Learn Tech Skills in 2025

Hello guys, if you are looking to learn web development or app development then there is a good chance that you may heard about Stephen Grider, one of the best Udemy instructor when it comes to teaching web development technologies. In the past, I have shared best online courses by Jose Portilla, Maximillian SchwarzMuller, Stephane Maarek and Brad Traversy and in this article, I am going to share best online course by Stephen Grider. But, First things first. before I tell you about the 10 best Udemy courses of Stephen Grider, let me tell you who the man really is.

Top 5 Python Courses for Data Science and Machine Learning in 2025 - Best of Lot

We all know what Python is, right? It is a high-level, general-purpose programming language with enhanced readability. The syntax is also well-constructed and has an object-oriented approach. This will enable programmers to write clear and logical code for small and large projects. Data Science can be broadly defined as a field that extracts insights from structured and unstructured data using scientific methods and algorithms. These insights can then be applied across various domains and fields. It can be used for increasing sales, optimizing workflow, cash flow, etc.

Top 6 Free Courses to learn PHP and MySQL in 2025 [Updated] - Best of lot

If you want to build web applications quickly like overnight or over the weekend, then PHP and MySQL are the right choices and because of this power, they are also the best language for freelancing and startups where a quick turnaround time is required. PHP and MySQL are incredibly powerful open source technologies that allow programmers and web developers to create functional websites and apps that go way beyond basic HTML. PHP is specially designed to generate interactive and dynamic websites and is also known as the server-side scripting language, while MySQL is one of the leading relational databases along with Oracle and Microsoft SQL Server.

Top 5 Free Courses to Learn C# (C-Sharp) in 2025 - Best of Lot

Many people underestimate the power of C# and never think highly of it when they talk about programming languages. Still, the truth is that C# is one of the popular programming languages of today's world, just behind JavaScript, SQL, and Java on StackOverFlow's Developer Survey for the last couple of years. There are a lot of jobs and opportunities available for experienced C# developers. It's one of the critical languages for developers working with Microsoft technologies like Windows and SQL Server. It is also one of the most popular programming languages for developing desktop GUI, surpassing Java Swing entirely in the last couple of years. I have seen many big investment banks switched from Swing to C# for their GUI development work.

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

Testing is an integral part of software development. We have long relied on manual testing by testers and QA professionals to ship quality software and find bugs, but that's not sustainable anymore. There is an increased focus on automation testing nowadays, and Selenium is leading its web drivers. If you don't know Selenium, it's a free automation testing tool for web applications. It can work with different web browsers like Chrome, Firefox, Internet Explorer, and Opera and simulate human-like behavior. Using Selenium, you can programmatically interact with all the other elements on a webpage. You can click on them, input text, extract text, and more.

Top 10 Free Udemy Courses to Learn Coding and Web Development in 2025 - Best of Lot

When I was a little kid, I remember reading somewhere that coding will be the language of the future. I was intrigued. What was this new language that I didn't know about and nobody around me spoke? How was it going to be the language of the future? Before we get to the 10 free Udemy courses that will teach you coding, let me tell you a little more about what coding is.  

Top 5 Free Courses to learn Salesforce in 2025 - Best of Lot

Hello there, If you want to learn the Salesforce platform and looking for some free online Salesforce courses, then you have come to the right place. Earlier, I shared the best online practices for  Salesforce Developer, Administrator, and App Builder certification. Today, I will share free Salesforce courses beginners can use to learn this handy platform and add an in-demand skill to their resume. The Salesforce platform is a unique platform for custom application design, analytics features, and new features.

Top 5 Free Courses to Learn Ruby on Rails for Beginners in 2025 - Best of Lot [UPDATED]

Hello guys, welcome to this post, here you will find some of the best free courses to learn Ruby programming language and Ruby on Rails framework online from Udemy. If you don't know what Ruby is and what is Rails framework is, then let me tell you that it's one of the simplest programming languages with little to no syntax. If you are new to programming or never coded before, then also developing a Ruby application will be much more comfortable than choosing any other programming language like Python or Java. 

Top 6 Online Course to learn from Java 9 to Java 23 in 2025 - Best of Lot

Hello guys, even though Java 15 is available now, many developers are still on Java 8 and not really caught up with changes in Java 9, 10, 11, 12, 13, or Java 14. If you are also in the same boat and want to start with Java 9 features, you have come to the right place. This article will share some of the best online courses to learn changes in Java 9, 10, 11, and later add more classes for Java 12, 13, 14, and 15. These JDK releases are packed with powerful features like modules, API enhancements like factory methods for an immutable list, set, and map, some changes on stream API and optional class, new features on process API, etc. 

5 Free Courses to Crack GCP Professional Cloud DevOps Engineer Exam in 2025 - Best of Lot

If you are preparing for Google Cloud Professional DevOps Engineer certification  in 2025 and looking for free online Google cloud DevOps Engineer courses then you have come to the right place. In the past, I have shared the best Google Cloud courses and best DevOps Courses,  as well as the best online training courses to pass cloud engineer, data engineer, and cloud architect certifications, but my readers kept asking for free online courses on Google Cloud, particularly for DevOps engineer certification, and today, I am going to share free GCP Cloud DevOps Engineer certification courses for both beginners and experienced cloud professionals.

Top 8 Free Courses to Learn Web Design in 2025 - Best of Lot

Hello guys, if you want to become a web designer and look for free online courses to learn web design in 2025, you have come to the right place. In the past, I have shared the best free online resources to learn key web development skills like HTML, CSS, JavaScript, Bootstrap, and today, I am going to share the best free resources to learn web design and development.  These free courses have been created by expert instructors like Jonas Schmedtmann, and they are from websites like Udemy, Coursera, and edX.  You can use these free online courses to learn these valuable skills and become a web designer and developer.

Top 5 Courses to Learn Angular for Web Development in 2025 - Best of Lot

Hello guys, if you want to learn Angular in 2025 and looking for the best Angular courses then you have come to the right place. In the past, I have shared many resources to learn and master Angular like the best Angular books as well as free courses to learn Angular but many of you asked me to share more comprehensive and in-depth Angular courses and here we are with the list of the best Angular online courses to learn in 2025. These are comprehensive, in-depth, and up-to-date Angular courses, curated from popular websites and online courses platforms like Udemy, Pluralsight, Coursera as well as interactive platforms like Educative. 

Top 5 Free Excel Tutorials and Courses for Beginners in 2025 - Best of Lot [UPDATED]

Hello guys, If you want to learn Microsoft Excel, a productivity tool for IT professionals, and looking for free online courses, then you have come to the right place. In the past, I have shared some Microsoft Excel courses for beginners and some advanced Excel courses for experienced programmers, which are very liked by you guys. Still, I also receive many requests to share some free resources to learn Microsoft Excel like free books, free online courses, and free tutorials, and that's why I am going to share the best free Microsoft  Excel courses from sites like Udemy in this article which you can use to learn this helpful tool online.

Top 5 Courses to Learn Agile and Scrum Methods in 2025 - Best of Lot

If you are a programmer, software developer, team lead, or project manager who wants to learn Agile and Scrum in 2025 and looking for the best Agile courses, then you have come to the right place. Earlier, I shared free Agile courses and books, and today, I will share the best Agile and Scrum online courses you can join in 2025 to learn these in-demand skills. The Agile software development approach is a powerful approach that is very popular among the development community. As technology advances rapidly, the client expectations are high, and the delivery time is less.

Top 70 Java Interview Questions for Junior Developers [1 to 2 Years Experienced]

Java Developer Interviews are very different than traditional software developer interviews. You can clear a Java interview without even writing a single line of code, Yes, this is true, you can become a Java developer without someone asking you to write a function in a Java interview. Though it's not the case everywhere and many companies are increasingly including a coding test in their Java developer interview process, but there are many companies and start-ups where you can get a Java job without writing a single line of code. All you need to do is learn those popular Java questions, which have been asked for ages, and mostly test whether a candidate is familiar with essential Java concepts or not like abstract class and interface. 

Difference between save(), saveOrUpdate() and persist() in Hibernate Session

The Session interface in Hibernate provides a couple of methods to move an object from a new or transient state to a persistent state like save(), saveOrUpdate(), and persist() is used to store an object into the database, but there are some significant differences between them. The Session.save() method does an INSERT to store the object into the database and it also returns the identifier generated by the database. On the other hand, saveOrUpdate() can be used to reattach a detached object in Hibernate Session i.e. it can do INSERT or UPDATE depending upon whether an object exists in the database or not. 

15 Technical Core Java Interview Questions Answers for Experienced Developers

When the experience of a Java Programmer grows in the years e.g. when it goes from beginner years ( 2 to 4) to more experience or sort of senior level ( 5 to 7 years), Core Java Interview Questions also change a bit. Of course, basics like data structure, algorithms, and object-oriented programming remains the same, but types of questions will become more advanced and their answers will definitely need to be more detailed and accurate. I often receive queries about core Java questions asked to a senior developer with 5 to 6-year experience, or, sometimes, I am going for an interview of a senior Java developer, what kind of questions I should expect. 

Top 10 Tough Core Java Interview Questions Answers for Programmers

tough core Java interviews questions and answers
What is a tough core java interview question? Why do people look for tough Java questions before going for an interview? well, I don't think I need to answer these tough questions because it's pretty natural to prepare for tough questions even if you are not expecting tough questions from core Java. If you are prepared for the tough and tricky Java interview question then you feel more confident and answer other Java interview questions with confidence. 

Top 5 Big Data, Spark, and Hadoop Courses for Beginners in 2025 - Best of Lot

Hello Java programmers, if you want to learn Big Data and related technologies like Apache Hadoop, Spark, Hive, Flume, etc in 2025 and looking for the best resources like books, tutorials, and online courses then you have come to the right place. Earlier, I have shared the best free Big data courses and best courses to learn Spark but a lot of you asked me about the more comprehensive and up-to-date Big data course recommendations. So, I have come up with this list which contains the best-paid courses you can join to learn Big Data in 2025. Although the courses are not free, they are very affordable, particularly Udemy courses which you can get for just $10 on Sales. They are also very comprehensive, up-to-date, and trusted by millions of developers and probably the best resources to learn Big Data online in 2025. 

Top 5 Free Apache Spark Course for Beginners to Learn Online in 2025 - Best of Lot

Hello guys, if you are thinking of learning Apache Spark to start your Big Data journey and looking for some excellent free resources, e.g., books, tutorials, and courses, then you have come to the right place. This article will share some of the best free online Apache Spark courses for Java, Scala, and Python developers. If you don't know what is Apache Spark? And Why it's so crucial in the Big Data world, then let me give you a brief overview first. Apache Spark is another cluster computing framework like Hadoop, which analyzes a vast data set. Still, it's much faster than Hadoop, which makes it ideal for today's high computing needs, like processing a massive amount of data.

Top 6 Free Courses to Learn Ethical Hacking and Penetration Testing in 2025 - Best of Lot [UPDATED]

Hello folks, if you want to learn Ethical Hacking and looking for free online courses, then you have come to the right place. Earlier, we have shared the best Cyber Security Courses, best CompTIA Security+ exam courses, and today, we are doing share free Ethical hacking courses for you. Most of us have even a little bit of knowledge about the subject or industry that would be ideal if you start a career in that field, but the problem for most people is finding the right course or program that help you master these skills and become professional in the field and click on this article likely shows that you are interested in ethical hacking.

Top 10 Programming Languages to Learn in 2025 [UPDATED]

Hello guys, we're just one week away from 2025. This is when most of us start making our goals like physical goals, educational goals, and financial goals. As a programmer, one of our goals is to learn new technologies and programming languages, but which languages should you learn? Since acquiring a programming language requires both time and patience, you should learn a language worth the effort; I mean., it can reward you with a better job and career growth. In this article, I will share with you the top 10 programming languages you can learn in 2025 to get a job in your favorite companies like Google, Microsoft, and Facebook.

Top 10 Books Java Developers Must Read

Hello guys, If you are a Java developer and wondering what to read, then you have come to the right place. In this article, I will share 10 books on Java, Spring, and related technology a Java developer can read. I have included books for both experienced Java developer who is more inclined to learn about architecture stuff,  developing for Cloud, Microservice, Java 9 to Java 21 features, and Spring 6 features and thinking of learning Kotlin to improve their productivity. Still, I have not forgotten junior and less experienced Java developers or some thinking of starting their journey into the Java world

Top 5 Free Apache Maven eBooks for Java Developers

If you are working in Java for a couple of years, you surely know about Maven, the most popular tool to build Java applications. Recently I had shared 10 things about Maven Java developers should know, (if you have read it yet, you can read it here) and I receive a lot of good feedback about how useful those plugins and Maven, in general, are for Java developers. This motivated me to write more stuff about Apache Maven, and then I thought about sharing some of the free Maven courses and eBooks Java developers can use to learn Maven. 

Top 5 Free Courses to learn Django for Beginners in 2025 - Best of Lot

Hello guys, if you want to learn Django and looking for some free online Django courses to start with, then you have come to the right place. In the past, I have shared the best Python courses and best Django courses, and today, I am going to share free Django courses you can join online to learn this useful full-stack Python framework. There is no doubt that Python is the king of a Programming language at this moment, and one main reason for that is the huge number of powerful frameworks and libraries it has for different purposes like automation, data science, machine learning, scripting, data analysis,  and Web development is no different.

Top 5 Free Courses to Learn Deep Learning and Artificial Intelligence in 2025 - Best of Lot

Hello guys, if you are interested in learning about Artificial Intelligence and how to build AI and looking for free online resources, you have come to the right place. Earlier, I have shared free Machine Learning and Free Data Science courses, and in this article, I am going to share free Artificial Intelligence and deep learning courses for beginners. These free courses are created from Udemy, Coursera, edX, and Pluralsight and designed by experts and trusted by thousands of people who want to learn Artificial Intelligence. Clicking on this article link shows that you are very interested in learning more about artificial intelligence but wait! Learning artificial intelligence is not that easy and never will be. 

Top 6 Courses to learn Web Development and Web Design in 2025 - Best of Lot

Hello guys,  web development is one of the most lucrative fields of Software development, and demand for web developers is always increasing. It's also one of the exciting fields as you create web applications that are used by real people and you can also make an impact on millions of lives if you got a chance to work on the next unicorn or big tech companies like Amazon, Google, or Facebook. if you want to learn web development in 2025 and become a web developer or looking for a web development job then you have come to the right place. Earlier, I have shared the best free web development courses and in this article, I am going to share the best web development courses for beginners. 

Top 5 Free Courses to learn Design Patterns in Java and TypeScript in 2025 - Best of Lot

No matter how good or experienced a programmer is, they will run across issues when programming. As a number of problems arise in code, you may see some commonalities, and when you try to address them, you may detect certain patterns. The term "Design pattern" comes into play here. Design patterns, in basic words, are tried-and-true solutions to common programming problems. For instance, creational design patterns address object creation issues.

Top 5 Courses to Learn Cyber Security Online in 2025 - Best of Lot

Hello folks, if you want to learn Cyber Security in 2025 and looking for the best online courses to learn Cyber Security to start your career, then you have come to the right place. Earlier, I have shared free Cyber Security courses and websites, and in this article, I am going to share the best Cyber Security online courses anyone can join to learn security essentials. These are also the best courses from popular online platforms like Udemy, Coursera, and Pluralsight and great resources to learn about Cyber Security, Ethical Hacking, Information Security, and much more. If you want to become a Cyber Security specialist, you should definitely check out these courses. 

Top 15 Courses to Learn System Design and Software Architecture in 2025 - Best of Lot

Software design or System design is one of the tricky concepts to master. You can quickly learn a programming language like Java or Python, but creating software using that programming language is a totally different thing. That's where software design and coding skills come to the rescue. It's actually an art to structure your program, design your modules, specify boundaries and interactions with other parts of the system so that they are easier to read, maintain, and flexible to change. It's one of the most essential skills for a software developer but often gets ignored. If you look for an online course to learn Software design and architecture, you won't find many, forget about good ones.

Top 10 Online Courses to Learn Data Structure and Algorithms in 2025 - Best of Lot

Hello guys, In the past, I have shared a lot of useful resources like books and tutorials to learn Data Structure and Algorithms for both beginners and experienced programmers. I have also shared a lot of Data Structure and Algorithmic interview questions like this and their solutions in Java. Still, I have got continuously queries about excellent online courses to learn Data Structure and Algorithms in Java. Even though the topics are completely independent with the programming language, Java developer definitely likes the online courses which teach Data Structure and Algorithms in Java, and that's why my recent post about best algorithms courses, which includes algorithms courses from JavaScript and Python didn't impress my readers.

Java Program to find Armstrong numbers with Example

Armstrong number Example in Java
How to check if a number is an Armstrong number or not? or write a Java program to find Armstrong's number? This is a common Java interview question asked on-campus interviews and fresher-level interviews. This is also a popular Java programming exercise on various schools, colleges, and computer courses to build programming logic among Students. An Armstrong number is a 3 digit number for which the sum of cube of its digits is equal to the number itself. 

How to Find Missing Number in a Sorted Array in Java [Solved]

Today's coding problem is not very new, it's an age-old classic Programming interview Question. You have a sorted array containing n - 1 unique number starting from 0 to n - 1. There is only one number missing in this range and you need to find that out. I mean you need to write a Java method to find the missing number and print its value in the console. Some of you might have seen this question before, but if you have not been asked this question before, what is the first approach comes into your mind to solve this question? Since only one number is missing, many programmers come up with the approach of iterating over the array, and comparing each element with the expected one like the first element should be 0, the second element should be 1, and so on.

How to check if strings are rotations of each other in Java? String Rotation Example Solution

String-based algorithmic questions are very popular in Java interviews e.g. checking if two String is the anagram of each other (see), or checking if given String is a palindrome (see), or just finding permutations of given String (see). One of such popular String-based interview questions is about to check if two Strings are a rotation of each other in Java. In order to solve this question, you should know what is String rotation? Well, A string is made of characters and you just rotate the String around any character like "programming" will become "ingprogramm" if we rotate the String on the trailing character 3 times.

How to check if Array contains given Number or String in Java [ Linear Search vs Binary Search]

Hello guys, one of the common coding questions from Java interviews is how to test if an Array contains a certain value or not? This is a simple question, but sometimes interview pressure makes candidates nervous. In this article, you'll learn how to solve this problem using different approaches. Since an array in Java doesn't have any inbuilt method for searching values, interviewers prefer to ask this question, to see how a candidate deals with such a situation. If you have good knowledge of Java API, then you will immediately come to know that there are alternatives available like using the binarySearch() method of Java Java .util.Arrays class or taking advantage of ArrayList contains method by first converting your array to ArrayList.

Top 6 Courses to Learn Google Cloud Platform or GCP in 2025 - Best of Lot

Hello folks, if you want to learn Google Cloud Platform in 2025 and looking for the best resources like online courses, books, websites, and tutorials then you have come to the right place. Earlier, I have shared the best free Google Cloud platform courses and best websites to learn GCP, in this article, I am going to share the best online courses to learn Google Cloud Platform in 2025. The Google Cloud Platform, or GCP, is similar to Amazon Web Services and is a public cloud vendor catering to businesses and enterprises. Customers can use the Google Cloud Platform to access the computer resources in Google's data centers present across the world. It is offered either as a free addition or on a pay-per-use basis.

Top 5 PostgreSQL Courses and Tutorials for Beginners in 2025 - Best of Lot

Hello guys, if you want to learn PostgreSQL and looking for the best resources like online courses, books, and tutorials then you have come to the right place. In the past, I have shared the best online courses to learn MySQL, Oracle, SQL Server, and SQL in general, and in this article, I am going to share the best online courses to learn PostgreSQL from Scratch. If you don't PostgreSQL is one of the popular databases and used by many companies in production It is an open-source, object-relational database system that has been around for more than 15 years. It has a strong reputation for reliability, stability, and data integrity.

Top 5 Free Courses to Learn NFT (Non Fungible Tokens) in 2025 - Best of Lot

Hello folks, if you want to learn about NFT in 2025 or want to create and sell your own NFT and looking for free resources then you have come to the right place. Earlier, I have shared the best Blockchain courses, best Ethereum Courses, and best courses to learn NFT (Non-Fungible Tokens), but a lot but then many of you ask for free courses and I decided to put together a list of the best free NFT courses you can join to learn everything about NFT, create Non Fungible tokens and sell them on different platforms like OpenSea. Before we get into the best free courses that you can use to learn more about NFT, you need to know the basics.

5 Best Ethical Hacking Courses for Beginners to Learn Online in 2025

Hello guys, if you want to become an ethical hacker in 2025 or a cyber security professional, you have come to the right place. In the past, I have shared the best Cyber Security courses, websites, and even best free courses to learn Ethical hacking, but my readers requested more, and today, I am going to share the best online courses to learn Ethical hacking in 2025 and become an Ethical Hacker and Cyber Security professional. We all know who a hacker is and what is hacking,   and how important cyber security is. But something is interesting about the origins of the word. The term 'hacker' was first coined to describe people who were experts at building mainframe systems, increasing their efficiency, and allowing the process of multi-tasking. 

Top 5 Apache Camel Online Courses for Java Developers in 2025 - Best of Lot

If you are looking to learn something new and awesome, like camel, you have come to the right place. Here, we will discuss some of the best courses available in the market currently which can really help you guys get on and learn Apache camel. Apache Camel is a black box that takes communications from one endpoint and forwards them to another. Messages may be handled or simply forwarded within the black box.

Coursera's Applied Data Science with Python Certification Review - Is it worth in 2025?

If you are thinking of joining Data Science with Python Specialization on Coursera but thinking about whether it's worth your time and money, you have come to the right place. Earlier, I have shared the best Coursera courses for Data Science, and today, I will review one of the most popular Data Science specializations on Coursera. If you have been learning online, then you may know that  Coursera is one of the giant platforms out there that offers courses in many different industries, from web development and IoT to business and self-development, and all those courses are created by major universities such as Michigan University and some companies like IBM which means you are in good hands when enrolling in some of their courses.

Top 5 Online Courses to Learn Selenium for Automation Testing in 2025 - Best of Lot

Hello folks,   If you want to become an Automation tester or just want to learn Selenium for writing automation tests with Java in 2025 to add a new and in-demand skill to your resume and looking for online courses, then you have come to the right place. Earlier, I have shared free classes to learn Selenium Web Driver. This article will share the 5 best Selenium online courses for beginners and experienced Java  Programmers and automation testers. 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.

Top 5 Online Courses to Learn Artificial Intelligence (AI) for Beginners in 2025 - Best of Lot

Hello guys, Artificial Intelligence is one of the growing fields in technology, and many developers are trying to learn Artificial Intelligence to take their careers next level. If you are a Python developer and looking for the best courses to learn Artificial Intelligence with Python, you have come to the right place. In this article, I will share the best courses to learn AI basics and some hands-on courses to practice AI with the Python library. I first came across AI when DeepMind beat Garry Kasparov, one of the finest players of Chess. It was way back in the 1990s, and AI has come a long way. Now, Google is using the same DeepMind to reduce the electric bills of its Data Center by 40%, and Elon Musk is talking about Self driving cars.

Review - Is Data Science Specialization from John Hopkins on Coursera worth It?

Hello guys, if you are thinking of joining Data Science Specialization at John Hopkins University in Coursera but thinking about whether it's worth your time and money, you have come to the right place. Earlier, I have shared the best Coursera courses for Data Science,  Cloud Computing,  Machine Learning, Python Programming, and today, I will review one of the most popular Data Science specializations on Coursera, Data Science Specialization by John Hopkins University. While Coursera has many top-quality Data Science certifications, this is probably the most popular of them, given its offered by Johns Hopkins University in the USA. 

Top 5 Free Udemy Courses for Google Cloud Professional Architect Certification [2025] - Best of Lot

Hello guys, if you are preparing for Google Cloud Professional Architect certification and looking for free online training courses, you have come to the right place. In the past, I have shared the best courses to learn Google Cloud and certification courses to pass cloud engineer, data engineer, and cloud architect certifications. Today, I will share free GCP Cloud Architect certification courses for beginners experienced cloud professionals. This is one of the most difficult and prestigious exams, similar ot the AWS Solution Architect and Azure Technology Architect (AZ-300) exam; once you pass this exam, you will have sufficient knowledge and skills to propose a Google cloud-based solution in-demand skill. 

Top 10 Cloud Computing Courses with Certificate in 2025 - Best of Lot

Before we get to the 5 best courses with certificates that will teach you everything you need to know about cloud computing, let me tell you what cloud computing really is. Cloud computing refers to a network of remote devices that are hosted on the internet for storing and receiving data. The cloud can act as servers, databases, software, networking, as well as virtual storage. It is basically a virtual platform where you can store your data and then access it through the internet. 

Top 10 Data Science Courses for Beginners in 2025 - Best of Lot

Hello guys, if you want to learn Data Science and looking for up-to-date course to learn Data Science from scratch then you have come to the right place. Earlier I have shared best Python courses, best AI courses and best Machine Learning courses and today, I am going to share best Data science courses for beginners. But before we get to the top 10 courses that will teach you all about data science, let me tell you a little bit more about what it really is.

In simple terms, data science is a domain that deals with large amounts of data with the help of modern tools and techniques. The goal is to find patterns and derive meaningful conclusions from them. Data scientists use machine learning algorithms for building predictive models.

6 Best Data Structure and Algorithms Courses for Beginners (Free)

Here are the best free Data Structures and Algorithms courses for Beginners to Join online:

Data Structure and Algorithm is one of the essential topics for programmers, both to get a job and do well on Job. Good knowledge of data structure and algorithm is the foundation of writing good code.

If you are familiar with essential data structures like an array, string, linked list, tree, map, and advanced data structure like Tries, AVL trees, etc and know when to use which data structure and compute the CPU and memory cost of your code in terms  

Even though you don't need to write your own array, linked list or hash table, given every major programming SKD provides them like JDK or C++ STL library, you will need to understand them so that you can use them in right place. 

Using the right data structure can drastically improve the performance of an algorithm.

Top 6 Websites to learn Microsoft Azure Cloud for FREE - Best of Lot

 Hello guys, Cloud Computing is a great skill to learn in 2024 and when it comes to choosing the Cloud Platform, Microsoft Azure is quickly becoming one of the essential skills for many developers, DevOps and software engineers as more and more companies are moving to Cloud and Azure. Many companies mostly investment banks are also adopting a multi-cloud strategy which means having a backup cloud platform apart from AWS which is also fueling demand for Azure engineers. If you want to learn Azure and looking for best resources then you have come to the right place. Earlier, I have shared best Cloud Computing courses, books as well as best Azure courses and today, I am going to share best places and websites to learn Cloud Computing with Microsoft Azure for FREE. 

Top 5 Online Courses to Learn HTML and CSS in Depth - Best of Lot

Hello guys, if you want to learn HTML and CSS to become a web designer and developer and are looking for the best HTML and CSS courses, you have come to the right place. In the past, I have shared the best free courses to learn HTML and CSS, and in this article, you have a selection of the best courses you can have to learn a lot about HTML5 and CSS3 online.  This article will share the best HTML5 and CSS 3 online courses from Udemy, Coursera, Pluralsight, and edX for beginners and experienced developers. These online training courses and classes are created by experts and trusted by thousands of developers to learn HTML5 and CSS3 online in 2024

How to solve Arithmetic overflow error converting IDENTITY to data type tinyint, smallint or int in Microsoft SQL Server database

Last year we had a production issue where one of our backup jobs was failing while inserting Orders aggregated from other systems into our SQL Server database. The reason was dreaded "Arithmetic overflow error converting IDENTITY to data type int" because the table was using IDENTITY feature of SQL Server to generate OrderId, and Identity has breached it a maximum value, which is around 2.1 billion, precisely 2,147,483,647. The error "Arithmetic overflow error converting IDENTITY to data type int" comes when the IDENTITY value is inserted into a column of data type int, but the value is out-of-range. For example, if the current value of Identity becomes more than 2,147,483,647, then you cannot store that into an int column because it's more than the maximum value of int in SQL Server.

How to Prepare for Google Cloud DevOps Engineer Exam in 2025? [The Ultimate Guide]

Hello guys, Are you aspiring to become a certified Google Cloud DevOps Engineer? Then you should go for this certification to get certified for your expertise in managing and automating Google Cloud Platform (GCP) services to streamline DevOps workflows. However, preparing for the Google Cloud DevOps Engineer exam can be challenging without proper guidance and preparation. But worry not! In this article, we will provide you with valuable tips, tricks, and resources to help you effectively prepare for the exam, avoid common mistakes, and increase your chances of success. 

Top 5 Books to Learn Web Development for Beginners in 2025 - Best of Lot

Having a career in web development can be a fun and fabulous experience. There are a lot of online videos on YouTube or paid courses to teach you this field, but not all people are fan of videos and many of us like to learn from books. So I’ve collected some of the best web development books to help you learn this field in a small amount of time and even maybe get a real job after completing them. While I also advocate a hybrid approach where you can start with these free web development online courses first to learn the 20% stuff which are used 80% of time and then move to books, but its totally up to you. 

Top 5 Machine Learning Certifications and Courses to Aim in 2025 - Best of Lot

These days, machine learning is by far the most prominent branch of computer science. It is one of the latest innovations, with many firms from different industries taking advantage of it. If you wish to learn this skill, it's no wonder considering its huge demand in society. ML is the analysis of software algorithms that can improve & develop on their own with input & their usage over time. It is considered to be a component of AI. ML algorithms create a model premised on learning stats to create forecasts or judgments without having to be specifically coded to do so.

How to prepare for Google Cloud Developer Certification exam? [Tips + Resources]

In the advent of an AI-based world, coding makes your life better both in terms of workplace and personal life. It helps you understand the developing world easier.  Every exam has its preparation strategy. Worthy things are never easy to get. One should put one's complete energy to clear what you want the most.  In this case, in the present day, this article is especially targeted to reach the hands of aspirants who wants to crack & possess the certificate of the most renowned exam. 

How to prepare for Google cloud developer exam

Before preparing for any exam, it's mandatory to know about the exam. In such a topic, the elements of the Google cloud developer exam is mandatory to take a look at. 

1. Is the Google cloud developer exam designated for you?

Google cloud developer exam is designated for anyone who wants to learn and for anyone interested in it. 

However, the Google cloud developer exam is specially designated for people who want to build, test, and deploy applications, managing and monitoring is performed. It is for people who have an undoubtedly quench to gain it.

2. All About Google cloud developer exam

The most prominent is

Duration of the exam: 2 hours

Exam fee: $200 (including all taxes)

Language: English and Japanese

Question format: multiple-choice questions

Total questions: 50

Prerequisite: none

Validity of the certificate: 2 years

Pass score: 80%

3. Why should you take Google cloud developer certification?

After all, why should you take this exam? What's the use of this certification? 

As Google puts it:

“A Professional Cloud Developer builds scalable and highly available applications using Google-recommended practices and tools. This individual has experience with cloud-native applications, developer tools, managed services, and next-generation databases. A Professional Cloud Developer also has proficiency with at least one general-purpose programming language and is skilled at producing meaningful metrics and logs to debug and trace code.”

As Google puts it, it depicts how important this skill is, and for the further developing generations. It gives you a vibrational reputation in your work areas for sure. 

Moreover, 75% of IT and software companies need technically skilled employees, who can handle data, clouds immensely. 

For further acknowledgement, click on this link. 

Link: https://support.google.com/cloud-certification/answer/9437163?hl=en

4. What are the subjects to be covered in the Google cloud developer exam? 

Here's the syllabus, an important part.

• Designing APIs. 

• Securities

• Data management

• Building applications. 

To take a look at the complete syllabus, click on this link

Link: https://cloud.google.com/certification/guides/cloud-developer

5. Is the Google cloud developer exam tough? 

It's usual for freshers, who don't have any data engineering experience to get stuck with the hardness of the exam. 

Yet, Google offers you a lot of certification exams, firstly, you should pick up the right one for you. This would make the path a little easier. And, anyone can clear it for sure!

6. What do you need to crack the Google cloud developer exam?  

Whenever it comes to Google Cloud or AWS, people think that they must know complete coding to crack these exams. Yet, their thoughts are completely wrong. I've known friends of mine, who don't know the ABC of coding, and cleared the exam on the first try. 

Firstly, you don't need any software engineer or IT background. You just need to know - how coding works, how staging codes works, etc. Secondly, Google certifications are not a pick-and-go type. You should need to understand, memorize, and digest the topics. It's also important to learn practically, due to the case study format of the exams. Lastly, there Google has recommended having 3 years of experience to clear this exam, which isn't mandatory! All it takes is how you understand their concept and solve the problems. 

7. Start your Google cloud developer exam study: 

The common question on every mind of beginners is “where should I start?”. The starting problem is a big question mark. 

And to this question, this article will be a light to your path in guiding you through your journey. Google's examinations are one of the toughest exams of all time. This writing will be your handbook.

7.1. Online Course for Google cloud developer exam 

Get a qualified course that saves your time and interest than countless YouTube videos. A course is always crucial to teach you - what an aspect is about, reasons to learn it, ways to learn it, sectors of the profession, foundational bound explanation, practical application of theoretical points, bookish understanding into lab workshop. The course defines how and what your journey through the subject has to be. Presenting you three unshakable courses from top virtual teaching platforms.

#1 - Google Cloud Developer - GCP Professional Certification 

I've also taken off through the experience of being in the classes in GCP security engineer and cloud development, and I refer this course with my own experiences.

Link: https://www.udemy.com/course/google-cloud-certified-professional-cloud-developer/

#2 - Ultimate Google Certified Professional Cloud Developer 2020 

In 17 hours of on-demand video, you'll get to learn everything from comprehending this certification exam to security, privacy and observance. In every section, you'll get exam directions as bonus hits. 

Link: https://www.udemy.com/course/google-cloud-platform-professional-cloud-developer-certification/

#3 - Google Cloud Certified Professional Cloud Developer

Whizlabs  is a place where most of the certification training is best. I've heard from people who have cleared these exams to always recommend giving a glimpse of this site. Updated exam information with assessments, exam preparation tips, case studies, practical challenges in labs, machine learning, downloadable resources, and so on... Phew! What else can I say about this course?! No words to enunciate it. The educator's theoretical points nail the words in your hearts. It has video courses and also practice tests.

Link: https://www.whizlabs.com/google-cloud-certified-professional-cloud-developer/

7.2. Publications for Google cloud developer exam

Just watching the videos and getting into the exam hall with the mindset that you'll clear it in no time isn't the right thought. It takes a lot of knowledge, especially from books. 

#1 - Google Cloud Platform for Developers 

Link: https://www.amazon.in/Google-Cloud-Platform-Developers-solutions/dp/1788837673

#2 - Google Certified Professional Cloud Developer: Exam Cram Notes

Link: https://www.amazon.in/Google-Certified-Professional-Cloud-Developer-ebook/dp/B09K42VP5J/

#3 - Google Cloud Certified Professional Cloud Developer Exam Guide: Modernize your applications using cloud-native services and best practices

Link: https://www.amazon.in/Google-Cloud-Certified-Professional-Developer/dp/1800560990/

7.3. Additional Resources for Google Cloud Platform for Developers 

Here are cheatsheets, whitepapers, blogs that are very useful in preparing for the exam. 

• Cheatsheet of GitHub is very promising and also revamps the updated version of the exam. 

Link https://github.com/priyankavergadia/google-cloud-4-words

• Whitepapers are better ones and worth spending your spare time in it. Here are the whitepapers from the official site, which would give an idea. 

Link: https://cloud.google.com/whitepapers

7.4. Best Simulators for Google cloud developer exam  

Now, it's time for the test! Simulators are nothing but a series of practice tests to check your theory grasping power. It also helps you in time management by managing your time in the given period of hours. You must work on practice examinations before you encounter the real one. 

Here are some great series, which were helpful for me. 

• Find instant practice exam questions, tools and study materials. It has 138 outstanding questions with answers for free. 

Link: https://www.google.com/amp/s/www.certification-questions.com/amp/google-exam/professional-cloud-developer-dumps.html

• Google Cloud Professional Cloud Developer Practice Test. Comprises 117 questions with detailed explanations and reference links. 

Link: https://www.udemy.com/course/google-cloud-professional-cloud-developer-practice-test/

• GCP: Professional Google Cloud Developer Practice Test with 41 backbreaking questions. 

Link: https://www.udemy.com/course/gcp-professional-google-cloud-developer-practice-test/

Make sure you Practice these tests and quizzes wisely. You must score 90% in the practice tests to crack the real one. 

7.5. Official Practice Sessions

Link https://docs.google.com/forms/d/e/1FAIpQLSfFeB8zBNi2q-ar0V7iIguhk2e6P-UkrJ8OJfg6n0k6HcYLDQ/viewform

You've to fill the form to take an official practice test, yet it's free. It's from the official Google Cloud page. It has a few questions which all are equal to the exam point of view. It's something like a mini-exam. I hope there were surplus questions in this. 

8. Common Doubts in Google Cloud Platform for Developer Exam

Doubts of registration, doubts in learning part, doubt in syllabus, and doubts in this, doubts in that, doubts doubts doubts. Every beginner's brain is flooded with so many questions when it comes to examination. 

Understanding your mind, Google has attached a FAQ part to its official page to clear all your doubts. You can view it just by clicking this link. 

Link: https://support.google.com/cloud-certification/#topic=9433215

You can just visit that site, describe your issue, and clear your doubts & queries. 

Wrapping up: 

The Google cloud developer exam has a wide range of applications in both terms of machine learning and data science. Hence, this certification adds color to your CV and to your life in acquiring your desired pay-check digit. 

Top 5 Places to learn Cloud Computing Online for FREE in 2025 - Best of lot

Hello guys, if you want to learn Cloud computing online and looking for online resources like books, online courses and tutorials then you have come to the right place. Earlier, I have shared both best free Cloud Computing courses as well as best paid Cloud Computing courses and books and in this article, I am going to share best places and online platforms to learn Cloud Computing in 2025. Cloud computing has been a buzzword all through the IT world for last 10-15 years. Everyday, in different parts of the world, we see new companies and organizations getting into the cloud. All of this has created a huge interest in cloud computing with a host of jobs and career opportunities in the field. In this blog, we are going to take a look at what is Cloud computing, followed by a walk-through of few websites and courses which I have specifically chosen for this blog.

Top 8 VS Code extensions to use with React - Best of Lot

Visual Studio Code, commonly known as VS Code is the most popular code editor in the world. VS code supports hundreds of languages and offers a beautiful user interface. It is considered an instantly productive coder editor because of its several features such as syntax highlighting, auto-indentation, snippets, and many more. Most of the React developers prefer using VS Code for React development because of the above-mentioned reasons. Apart from its features, several useful extensions can be installed in VS Code to make React development easier. 

Review - Is DataCamp worth it in 2025? (with SQL and Data Science Cheat sheets)

 Hello guys, if you want to learn Data skills online like SQL, Python, Data Science, Data Analysis, Pandas, NumPy etc and wondering whether Datacamp is right place or not then you have come to the right place. Earlier, I have shared best paid Datacamp courses, best Datacamp certifications, and best free Datacamp courses to learn new data skills in 2023 and today, I am going to share my thoughts on whether Datacamp is worth your time and money or not for learning Data skills like SQL and Python. The first thing you need to know about DataCamp is that it is one of the best places to learn Python and other data skills internet where you can learn everything you need to know about data science and data analytics, along with programming languages. 

Review - Is IT Fundamentals for Cybersecurity Specialization on Coursera Worth it? (2025)

Learning the information technology (IT) fundamentals in general and cyber security is a good investment in yourself since there is a massive demand for these skills. Companies need people to secure their infrastructure, such as their servers where they host the website and user's data, monitor their network for unauthorized access, and scan the employee computers for any trojan and viruses that could give hackers control over your system.

Review - Is IBM Data Analytics with Excel and R Professional Certificate Worth it? (2025)

Companies are always collecting data about their customer’s behavior on their platform or maybe their products review and many other standards to make better decisions to improve their services and the user experience. Still, this data needs someone who can leverage the power of the data to make decisions, which is the role of data analysts. This career is one of the hottest in this century. Analyzing the data to get insight and better understand your users and customer will help you make your business successful or maybe have a good position in a company. 

Review - Is Data Science Fundamentals with Python and SQL Specialization on Coursera Worth It in 2025?

The demand for people who can analyze big data and extract meaningful information to drive decisions for companies is increasing every day. They need them to improve the quality of their services and deliver the best user experience for their customers. These actions are the responsibility and the role of the data scientists. Data scientists need to know many skills to perform the data analysis and make decisions such as the skills to collect data from different sources like the web and also extract and filter the data from the databases and clean them before performing analysis and even learn machine learning and deep learning to perform much more complex actions and make predictions but not all the data scientists know the artificial intelligence and not a mandatory skills. Still, it will be good if you have that in your belt.

Review - Is AlgoMonster.com Good Place for Coding and System Design Interview Preparation in 2025?

Hello guys, if you are preparing for coding interviews and wondering whether joining AlgoMonster is right decision or not then you have come to the right place. Earlier I have shared best website for coding interview preparation, books, and best coding interview courses and in this article, we will review Algo Monster, one of the top site for coding interview preparation. Before we review Algomonster, let me tell you what it really is. For those of you who don't know, Algomonster is a legit site and basically an interview prep site with a focus on coding that will help you clear your interview and land your dream coding job. 

Review - Pluralsight vs Coursera Plus? Which is better for Programmers in 2025?

Online learning is probably the best and most innovative idea in this age because it allows people worldwide to access content and learn new skills from their homes and on their schedules without spending money on college. You can learn almost anything you want from the comfort of your own, and the same goes for any technical and programming skills. But, when it comes to learning technical skills, two of the best platforms are Coursera Plus and Pluralsight. And this article will show you a comparison between them. 

Top 8 Online Courses to Learn System Design and Software Architecture on Udemy (2025)

Hello friends, If you're aiming to master Software Architecture and System Design in 2025, you're in the right place. Whether you're preparing for tough technical interviews or simply want to become a better software engineer, understanding system design is a must. But let’s be honest—it’s also one of the most challenging topics to master. Many developers, including experienced ones, struggle with system design interviews—especially when applying to top tech companies like Google, Meta, Amazon, Apple, Microsoft, and Netflix (formerly known as FAANG, now MAANG).

10 Essential Object Oriented Concepts for Java Developers

Hello friends, I have written several OOP (Object Oriented Programming) concepts tutorials in past and I was thinking to bring them together so that anyone who wants to learn OOP basics can benefit from them easily. In this article, I will share with you my collection of OOP tutorials and OOP concepts interview questions, which will not only help you to understand four pillars of Object-Oriented programming like Abstraction, Encapsulation, Inheritance, and Polymorphism but also powerful design techniques of Aggregation, Association, and Composition, along with SOLID design principles, which are key to write flexible, extensible and object-oriented software. 

Top 5 Java Performance Courses for Experienced Developers in 2025 - Best of Lot

Hello guys, if you have been doing Java development for few years, then you know that Performance is the key for any Java application. As a senior Java developer, one should know how to improve the performance of Java applications and understand memory management and garbage collection, which often causes Performance in Java applications. These are some advanced skills that take some effort to develop. It doesn't come by default even if you have been programming in Java for years, as most people don't touch these topics. Many of them are afraid or take the performance tuning work and always look up to the most senior or brilliant developers in their team.

Top 5 Free Udemy Courses to Learn Google Cloud Platform for Beginners in 2025 - Best of Lot

Hello guys,  If you also want to learn Google Cloud Platform in 2025 and are looking for some free online Google Cloud training courses and materials to start your GCP journey, you have come to the right place. Earlier, I have shared the best Google certification courses. Today, I will share free online courses from Udemy and Coursera, which you can learn from the Google Cloud Platform. If you don't know, Google Cloud Platform is the massive Cloud platform for Google, one of the three biggest public cloud platforms along with AWS and Microsoft Azure.  There is a huge demand for Google Cloud Professionals, but there are few in the market; hence more and more people are learning about Google Cloud and getting certified.

Tech Certification Practice Tests - Java +Spring + Data + AI + Cloud - All $9.99 (Limited Time)

Dear Students,

I hope this email finds you well and making progress on your tech certification journey in 2025!

As many of you have reached out asking for additional practice resources, I wanted to share some exciting news.

For a limited time only (until March 28th), all of my certification practice test courses on Udemy are available for just $9.99 each with the coupon code MARCH2024.

How to Fix Unsupported major.minor version 60.0, 59.0, 58.0, 57.0, 56.0, 55.0, 54, 0, 53.0, 52.00, 51.0 Error in Eclipse & Java

The UnsupportedClassVersionError is a big nightmare for Java developers, probably the next biggest after NoClassDefFoundError and ClassNotFoundException but it's slightly easier to solve. The root cause of this error is that your code is compiled using a higher JDK version and you are trying to run it on the lower version. For example, the Unsupported major.minor version 53.0 means your code is compiled in JDK 9 (the class version 52 corresponds to JDK 9) and you are trying to run it on any JRE lower than Java 9, probably JDK 8, 7, or 6.

How to fix java.lang.OutOfMemoryError: unable to create new native thread [Solution]

There are several types of OutOfMemoryError in Java e.g. OutOfMemoryError related to Java heap space and permgen space, and a new one coming in Java 8, Java.lang.OutOfMemoryError: Metaspace. Each and every OutOfMemoryError has its own unique reason and corresponding unique solution. For example, java.langOutOfMemoryError: Java Heap Space comes when the application has exhausted all heap memory and tries to create an object which requires further memory allocation, At that time JVM throws this error to tell the application that it's not possible to create an object.

10 Essential Spring MVC and REST Annotations with Examples for Java Programmers

Hello guys, welcome to my third article on exploring essential annotations from the Spring framework, the most popular framework for Java development. In the first article, I have shared some of the most useful Spring Framework annotations, which were based upon Core Spring functionalities like dependency injection, inversion of control, and configuration, and in the second article, you have learned about important Spring Cloud annotations like @EnableConfigServer, @EnableEurekaSever, and @EnableDiscoveryClient. Now that you know those essential Spring annotations it's time to move towards Spring MVC and REST, one of the most used parts of Spring Framework.

How to solve java.lang.NoClassDefFoundError: org/springframework/beans/factory/SmartInitializingSingleton in Spring Boot [Solved]

Problem:
I was trying to run a HelloWorld program using Spring Boot when I got this error:

Exception in thread "main" java.lang.IllegalStateException: Could not evaluate condition on org.springframework.boot.autoconfigure.PropertyPlaceholderAutoConfiguration#propertySourcesPlaceholderConfigurer due to internal class not found. This can happen if you are @ComponentScanning a springframework package (e.g. if you put a @ComponentScan in the default package by mistake)
at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:52)
at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:92)
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForBeanMethod(ConfigurationClassBeanDefinitionReader.java:174)
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:136)

Difference between @Component, @Controller, @Service, and @Repository in Spring

Hello guys if you are wondering what is the difference between @Component, @Controller, @Service, and @Reposistory annotation in Spring Framework then you have come to the right place. In the past, I have shared 15 Spring Boot Interview Questions and 30 Spring MVC questions and in this article, I am going to answer the fundamental and popular Spring questions about @Component, @Controller, @Service, and @Repository annotation, but before we go into differences, let's understand the similarity first.

29 Spring Framework Interview Questions Answers for 5 years Experienced

Spring is one of the most popular framework and most widely used to develop Java Web application using MVC framework. Due to its immense popularity its expected from Java guys to know how to use Spring framework and how it works. Most of the Java development position uses Spring, Hibernate along with core Java and JEE web technologies like Servlet, JSP, and JSF. In this article, I will be sharing some frequently asked Spring interview question for Java JEE developers. It will contain questions from different Spring modules like Spring MVC, Spring core, the concept on which Spring is built e.g. IOC and DI and Spring security.