Top 10 Free Courses for System Design Interviews in 2025 - Best of Lot

Hello guys, if you are preparing for System Design Interview or just want to improve your Software design skills and looking for best free resources like tutorials and free online courses then you have come to the right place. In the past, I have shared best System design courses, books, websites, and popular System design questions but a lot of you asked for free resources and that's why I am going to share best free System design courses I found online. These online System Design training courses are completely free and provides a diverse knowledge about different System design concepts and process. 

Review - Is ByteByteGo System Design Interview Course by Alex Xu Really Worth it in 2025?

Hello guys, if you are preparing for System Design Interview in 2025 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 in 2025? 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 and most importantly Alex Xu regularly and new content and update old ones, for example, he has recently added a section for coding interview patterns in ByteByteGo website.

Educative Review - Is Grokking Modern System Design for Software Engineers and Managers worth it?

Hello guys, System Design Interview is one of the hardest part of any coding or programming job interview and it requires a lot of preparation and knowledge to crack system design interview. You need to know a lot of System design concepts like API Gateway, Load Balancer, Microservices vs Monolithic architecture, SQL vs NoSQL, Horizontal vs Vertical scalability and much. If you are preparing for System design interview then you may have come across that Educative.io has one of best System design courses like this one and Grokking the System Design Interview.  Before I give you my verdict on whether you need to choose Educative's Grokking Modern System Design For Software Engineers And Managers course, let me tell you a little bit about what system design really is.

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.

100+ System Design Interview Questions and Problems for Software Engineers

Hello guys, if you are preparing for System Design interviews then you may know that you have to prepare for theory questions as well as System design problems where you need to design a real world system like WhatsApp, YouTube or DropBox. Theory questions are mostly based upon System design basics and core concepts like Scalability, Caching, database sharding, load balancer, API gateway, security, proxies, messaging queues and software architecture, particularly Microservices. I have been sharing a lot of system design preparation material from last few years, in for example, in the past, I have shared System Design Interview Prep Guide as well as best System design interview books, courses, cheat sheets, and websites and in this article, I am target to share 100+ System Design Interview questions as well as System Design Problems.

4 Steps to Prepare for System Design Interviews in 2025? [The Ultimate Guide]

Hello guys, if you are preparing for Software Engineer Interviews, or Software developer interview then you may know that how difficult it is to prepare for them because of  System Design interviews, given its open ended nature and vastness but at the same time you cannot ignore it. In Software Engineering world, if you are applying for a Senior Engineer / Lead / Architect / or a more senior role, System Design is the most sought-after skill, and hence one of the most important rounds in the whole process. If you mess this up, nothing else would matter. If you get it right though, you’re looking at a raise of at least tens of thousands of dollars annually. 

How to Design Vending Machine in Java - Part 2 [Object Oriented Design Problem with Solution]

This is the second part of the Java tutorial to show how to design Vending Machine in Java. In the first part, we have discussed the problem statement and the solution itself, but unit testing and design document were still pending, which we'll see in this article.  As I said, there are multiple ways to design a Vending machine in Java, for example, you could have easily used state design patterns to implement a vending machine, in fact, it's one of the best examples of State design patterns. Vending machine behaves differently in different states like return a product if the machine is not empty, otherwise, it just returns coins, so it ideally fits in the state design pattern.

Top 40 OOP Object Oriented Programming Interview Questions and Answers

OOP Interview questions or Object-oriented programming and design interview question are an integral part of any programming job interviews like Java, C++, or C#. Since Java is an Object-oriented programming language, it's expected from Java developers that he is good at Object-oriented analysis and design and familiar with essential OOP concepts like Abstraction, Encapsulation, and Polymorphism. Object-Oriented Programming Interview question in Java is mainly based around fundamental OOP concept and how those are implemented in Java, like Abstraction OOP concept is implemented using an interface and abstract class, Encapsulation is using private keyword, etc.

Top 50 Linux Interview Questions Answers for 3 to 5 Years Experienced

Linux is the #1 operating system for hosting real world production application. Most of the real world Java application in big IBs are hosted on RedHat Linux. This makes Linux an extremely important skill for getting a Job. Along with any programming language e.g. Java or C++, you must have good command on Linux and SQL to get a programming job. Btw, Linux is not just limited for development job but it is even more important for support roles and system admin jobs. If you are working in production support then an excellent knowledge of Linux is expected from you, which includes knowing fundamental of Linux e.g. how Linux OS works?, what is kernel or shell?, or what is init process?, as well as good knowledge of various Linux commands to perform day-to-day job, and troubleshoot any production issues. 

Review - Is Build Responsive Real-World Websites With HTML and CSS course on Udemy worth it?

Hello guys, if you want to learn HTML and CSS for Web development and looking for best online courses or tutorials then you have come to the right place. Earlier, I have shared best web development courses, books as well as free web development courses and in this article, I am going to review on of my favorite web development course from Udemy, the Build Responsive Real-World Websites With HTML and CSS by Jonas Schmedtmann. Web development is becoming a necessary field that all companies need to reach their customers either by building a simple website or building a web application that will help them offer their services to other people. 

Top 8 Free Courses to Learn Kotlin in 2025

Before we get to the 7 best free courses that will teach you everything you need to learn about Kotlin, let me tell you what it really is. It was way back in May 2019 that Google announced something we all had known inside for a long time. Kotlin had become the most popular programming language for Android app developers. The main advantage that Kotlin has over other programming languages is the fact that it is really simple and concise. It requires less programming, less testing, and less maintenance. These days, Kotlin has firmly dethroned Java as the go-to programming language for Android app developers. But Kotlin has even bigger goals. It aims to become the preferred programming language for multiple platforms, including iOS.

10 Git commands Every Developer Should Know/Learn

Hello guys, if you are a Programmer you probably have heard about Git, well most of you might have already been veteran into Git and don't need any more articles and tutorials, but if you are a beginner then Git is one of the most important skill to learn. If you are a Computer Science graduate, a Software Engineer, or even a Student trying to learn Programming on your own, Git is a must-know skill for you. If you already know the importance of Git and looking for best resources to learn Git then you have come to the right place. Earlier, I have shared best free Git courses and best places to learn Git and in this article, I am going to share examples of essential git commands which every programmer should know.

Review - Is Coursera's Meta Database Engineer Professional Certificate Worth it? (2025)

 Hello guys, If you're aiming to break into the data engineering field or looking to boost your career with a recognized credential, the Meta Database Engineer Professional Certificate on Coursera might have caught your attention. Offered by Meta (formerly Facebook), this program is designed to teach foundational to intermediate skills in database engineering—covering everything from relational databases and SQL to data modeling and cloud database solutions. It's marketed as a job-ready pathway, especially for those interested in roles like data engineer, database administrator, or back-end developer.

Top 20 Angular interview questions and Answers for 1 to 2 Years Experienced

Hello guys, if you are preparing for Angular developer interview or a web developer interview where Angular skills are required and looking for Angular interview questions to practice then you have come to the right place. Earlier, I have shared best Angular books and courses as well as web development interview questions and today, I am going to share Angular interview questions and answers for practicing interviews. Angular is one of the earliest frontend frameworks. The framework came out in 2010 at a time when modern development was starting to take place. It was, then, known as AngularJS. The popularity of AngularJS increased rapidly and it became one of the top frontend frameworks in no time. But soon, new landscapes were introduced in development, especially in JavaScript. AngularJS could not cope with it and the core team realized they needed to make the necessary changes. 

Top 5 Courses to Crack AWS Certified SysOps Administrator Associate Exam SOA-C02 in 2025

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