IBM

The behavioral, technical, and managerial interviews all went well. The technical interview consisted of system design and a coding task. I had to solve some React coding challenges via a collaborative IDE session.

I was automatically invited to a HackerRank coding assessment minutes after applying. I invested an hour in the two challenges, solved them, and passed them, only to be rejected two weeks later. They make you take the coding assessment without even

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