IBM

The interview process involved a few steps: * With tech leaders * With a senior engineer and a peer * The final one with the department head The first step was a high-level conversation, followed by the technical ones.

I went through a behavioral interview and then a technical interview. The process was challenging, but I believe it was fair. The technical interview covered different areas of the expected knowledge base.

Core Java & OOP What are the four pillars of Object-Oriented Programming? Can you explain each with examples? Difference between an abstract class and an interface? When do you use which one? What is polymorphism? Explain compile-time vs run-time