Total 3 rounds:

1. DS Algo Round (Interviewer was very kind. The interviewer asked me which data structure I am very confident in and asked questions on that only.)

2. Questions on Java, Spring Boot, Database, data structures, and REST API.

3. Hiring Manager Round.

Round 1:

DS Algo Q1: Common elements between two arrays.

Q2: Detect loop in LinkedList, find the length of the loop, and remove the loop in LL.

Round 2:

1. Explain your project and have a brief discussion on the project.
2. Why are you using this particular database in your project? For example, why are you using a MySQL database?
3. Discussion on immutability in Java: How to make a class immutable.
4. Questions on multithreading and concurrency in Java.