Sr Java Developer Interview Questions

5,575 sr java developer interview questions shared by candidates

1) Explain about microservices architecture 2.Give brief explanation about API Gateway configuration 3. What is the role of service registry and which registry have you used in your application 4. How you handle authentication and Authorization in your microservices 5. How to communicate each microservices one to another 6. How you create one microservices from scratch 7. What is meant by stereotype annotation and explain it 8. Transactional annotation which purpose you used in your application 9. Explain about concurrent Hashmap and explain about internal working structure 10. Lifecycle of maven 11. Do you have any idea about Docker and Kubernetes.. Coding: Some Java streams snippet questions is related to strings and number logic
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Senior Java Developer

Interviewed at Cognizant

3.1
Nov 25, 2025

1) Explain about microservices architecture 2.Give brief explanation about API Gateway configuration 3. What is the role of service registry and which registry have you used in your application 4. How you handle authentication and Authorization in your microservices 5. How to communicate each microservices one to another 6. How you create one microservices from scratch 7. What is meant by stereotype annotation and explain it 8. Transactional annotation which purpose you used in your application 9. Explain about concurrent Hashmap and explain about internal working structure 10. Lifecycle of maven 11. Do you have any idea about Docker and Kubernetes.. Coding: Some Java streams snippet questions is related to strings and number logic

3 Rounds - Round 1- Paper Test - MCQs(Hibernate,MultiThreading,Bit Manipulation,Logical Reasoning, Quantitative Aptitude, English Grammer Test) 2. Face to Face Interview Round 2 - String Questions(paper Coding) Basic Spring Boot Questions. Round 3 - Project Discussion Queries related to the project.
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Senior Java Developer

Interviewed at Reserve Bank Information Technology

3.5
Feb 9, 2024

3 Rounds - Round 1- Paper Test - MCQs(Hibernate,MultiThreading,Bit Manipulation,Logical Reasoning, Quantitative Aptitude, English Grammer Test) 2. Face to Face Interview Round 2 - String Questions(paper Coding) Basic Spring Boot Questions. Round 3 - Project Discussion Queries related to the project.

First round interview was technical where asked mostly on spring, hibernate and core java. In 2nd round of interview there was first coding exercise given to write program for minesweeper where input was matrix with mines where read the input which is matrix of mines and output should to display count of mines in empty cells. After this asked lot of interview questions including current job project, spring, hibernate, design pattern, core java, oracle, performance tuning and many more. I cleared till this round and asked again on next day further f2f interview to write especially program to tic-tac-toe game. This time i did not wrote code but explained logic still not got selected. Lot of confusion on what actually they are looking for a candidate.
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Senior Java JEE Developer

Interviewed at Wowcher

2.8
Dec 24, 2013

First round interview was technical where asked mostly on spring, hibernate and core java. In 2nd round of interview there was first coding exercise given to write program for minesweeper where input was matrix with mines where read the input which is matrix of mines and output should to display count of mines in empty cells. After this asked lot of interview questions including current job project, spring, hibernate, design pattern, core java, oracle, performance tuning and many more. I cleared till this round and asked again on next day further f2f interview to write especially program to tic-tac-toe game. This time i did not wrote code but explained logic still not got selected. Lot of confusion on what actually they are looking for a candidate.

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