I got a call from HR after I applied on LinkedIn and Naukri.

Initially, we scheduled two technical rounds, one techno/managerial round, one coding round, and a final HR discussion.

After that, within 2-3 days, we received an email asking for all details, payslips, etc. Within a week, they will release the offer letter.

1st round: What is volatile and transient keywords in Java? Why do we use them? Synchronization, multithreading, HashMap vs. Hashtable, collections. How do you synchronize a map? Which is a better way? Fail-fast vs. fail-safe. Comparator vs. Comparable. Thread creation. Thread scenario questions. Difference between class loaders.

2nd round: Design patterns: Singleton, Factory. Wait vs. sleep, notify in threads. Abstract class vs. interface. How do you create an immutable class? Java 8 streams, functional interfaces, lambda expressions. Spring Boot microservices, authentication, authorization, Spring Security. How to connect to DB. Exception handling in Spring Boot.

1 program: Given an array with duplicate integers, find the number which is repeated the most number of times. If we have multiple, print them.

3rd round: General discussion about projects, scenario questions, design thinking, performance, scalability, usage questions, Agile model, puzzles, programming question of balanced parenthesis.

4th Coding round: 1 Easy HackerRank question.

5th HR round: General discussion, salary negotiation.