JAVA Interview Questions(300+) for [0-15+ yrs Exp]
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About the Book

Over the years, I have interviewed 700+ candidates and personally attended 100+ interviews, gaining insights into what truly matters in real-world technical evaluations. From this journey, I have curated a fine-grained set of 300+ interview questions, carefully reviewed by industry experts and refined through multiple iterations.


This collection is crafted to be relevant for every Java developer – from freshers starting their journey to seasoned professionals with 15+ years of experience looking to sharpen their edge.


📘 What’s Inside?

  1. Java
  2. Spring Boot & Microservices
  3. Kafka & Event-Driven Systems
  4. Application Security Essentials
  5. Spring Data
  6. System Design & Architecture
  7. Scenario-Based Questions
  8. DSA: 7 Proven Problem-Solving Patterns
  9. Latest Java 21 & Java 25 Questions


This is not just a Q&A book – it’s a practical learning resource designed to provide flexible and thorough preparation for developers at any stage of their career.



NOTE : It’s only set of 300+ interviews questions, Answers are not included BUT I am working on it ,it will be available soon.


👨‍💻 About the Author

Amitesh Kumar Ray is a seasoned software engineer with 11+ years of product development experience, currently working as a Lead SDE. He holds a System Design & Architecture certification from the University of Alberta and is pursuing an Advanced Certification in AI & ML from IIT Madras.


He has authored 15+ books on Java, Spring Boot, Microservices, and System Design & Architecture, widely appreciated by developers worldwide. Having conducted 700+ technical interviews and mentored professionals across levels, Amitesh brings a unique insider perspective into what interviewers truly look for.


With a passion for simplifying complex concepts, he actively contributes to the developer community through books, mentorship, and technical discussions.


🔥 Why this book?

Because it’s not just theory – it’s the result of real interviews, real experiences, and real industry insights. If you want to prepare smartly and confidently for your next interview, this is the guide you’ve been looking for.

Don’t take it from me

Hear what others have to say
It was a great mock interview session and he asked the questions from each and every dark corner of java ,springboot,miscoservies ,DSA,Kafka and system design.I can’t say you thank you for such interactive and informative session but I can say that it’s the best way that you streamlined the questions from different tech stack and also provide guidance on how to prepare for interview and finally he shared me the list of 200 questions that’s a unified collections of most frequently asked questions in interview. Thank you very much Amitesh for your valuable time and suggestions.
Zahir Khan
Sep 2024
It was very nice mock interview,he covers all the corner of java and springboot,they he ask question and make candidate comfortable to answer is really appreciable.his feedback will really help me to grow and prepare for next real interview.thanks for your time Amitesh
Abhishek Ranjan
Sep 2024
It was a good experience to know and very helpful and friendly in nature, also gave me a good advice how to answer your questions which is asked by the interviewer and provided some suggestions as well how to prepare well, important questions for Java developer.
Anonymous
Sep 2024
Hi Amitesh, I loved the way of talking and I'll follow your advices. It was a nice interaction with you. Thanks, Vikas Kumar Jaiswal
Vikas Kumar Jaiswal
Sep 2024
mr.amitesh is very helpful and kindly person. he is taking the screening call for me that he is very kind hearted person and also tell us how we solve or think.
Saurav Singh
Sep 2024
$ 21$4