There were 3 rounds:

1. Technical - Panel of two:

   • Questions on core Java, design questions.
   • How to design an end-to-end application.
   • Front-end questions with JavaScript.

2. Technical:

   • Questions on Core Java concepts.

3. Managerial Round:

   • Basic Java questions.
   • SQL question.

4. Discussion with VP about the Role.

5. HR round.

Design a Singleton class. Prevent it from reflection, cloning, and serialization.

Explain OOPs concepts and the rules of overriding.

Explain the internal implementation of HashMap in detail, including hashing.

What is the difference between an interface and an abstract class? When would you use each?

Write an SQL query to get the employee name with their manager.