The most bad part was the interviewer asked me say 10 questions , I could not answer 2 questions and he wrote the same in the feedback and rejected me. But to my surprise , I later got to know that answers he was expecting from me were actually wrong and it all got screwed.
1. Introduction 2. Project Overview (Flow, Tools, Technologies and Framework) 3. Agile 4. Stream API Question 5. Java 8 Features 6. Multithreading 7. Hashmap internal working and pseudo codes 8. @Transactional in database in details 9. How to handle concurrency in database for multiple parallel transactions 10. Design Patterns 12. Microservices Design Patterns 13. JPA and JDBC Questions 14. Others
Q1. Spring Security - JWT & AuthO Q2. How many methods to establish the communications between microservices? Q3. Difference between Kafka and RabbitMQ. Q4. How to deploy an application to EC2? Q5. What is Docker and explain some of its commands. Q6. What is Kubernetes and explain some of its commands. Q7. Which microservices design patterns have you used in your application? Q8. What are design patterns? Q9. What is the output of 2.0/0.0? Q10. There are N resources and N threads. You need to assign each thread to each resource so that there shouldn’t be a Thread DeadLock condition. Q11. Difference between Servlets and Common Gateway Interface(CGI). Q12. Difference between Hibernate and JDBC. Q13. Difference between Clustered and non-clustered Image. Q14. Explain the Single-row & Multi-row function. Q15. How many types of indexes are there and explain. Q16. If there is no Foreign Key in between two tables then how will you fetch the data? Q17. Difference between Self-join and Equi-join. Q18. Difference between JRE and JIT and explain. Q19. There is a Junior developer who committed and pushed the faulty 100s of lines of code without telling anyone. You got to after weeks of this incident happening. How will you tackle the situation and what are your future actions? Q20. You have pulled from a source branch and got some merge conflicts. You want to keep your changes. How will you resolve merge conflicts?
Scenario Based question with respect to backend development
Scenario based questions on optimization of API.
Describe your most challenging project
One of the questions was about concurrent collections and their usage
Can you alk about java collections?
When is String pool used? How? Types of creating String object.
Tell me about bean scopes?
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