There were 4 rounds.

First is telephonic. Here, they asked about test cases and scenarios.

Second round is written. Here, they provided me with an application description and asked me to write functional, non-functional, and automation scripts for it.

Third round is programming skills. They provided a programming problem. Upon providing a solution, they asked to modify it, followed by white-box testing and code optimization.

Fourth round is verbal. Here, they asked several questions regarding data structures, puzzles, and my current role and work profile.

When does a stack overflow occur?

Which variables are stored in the heap and stack?

Why do you want to leave your current company?