I applied through college or university. The process took 1 day.

• Online Assessment: 1 hour
• Group Discussion: 1 hour

The above two were before the interview process.

• Interview Round 1 (pen+paper DSA round): 1 hour
• Interview Round 2 (Coding): 1 hour
• HR Round: 20 mins

This was a campus interview at IITB.

Before the interview, there were two rounds.

OA:

• They gave 3 coding questions of Leetcode Medium/Hard difficulty, all of them on graphs.
• 1 question was there to test the debugging skills in OOPS.
• All of the coding questions were to be attempted in C++.

Group Discussion: We were given a piece of paper with some C++ code on it and we had to answer some questions in a group:

• What is this code doing?
• What is this class's main function?
• What bugs do you see here?
• What possible optimizations can you suggest here?

People needed to raise their hands to answer. Interviewers were helpful and helped us arrive at the answers.

Now the interview rounds.

Round 1: DSA Pen+Paper Round I was given a 10-page problem statement and the interviewers left me alone in the room and told me that I can read the problem statement on my own for 20 minutes. After 20 minutes, when they came back, they asked me my approach to solve the problem:

• What data structure would you use?
• How would you optimize this functionality if you don't care about the other one?

In each case, I was asked the best case and worst case time complexity.

Round 2: Coding Round I was asked to code the same thing, but they said more than me passing all the test cases they were interested in the way I approach the coding. So I was given a few files, with different classes, and I needed to analyze and implement whatever we discussed in the previous round.

The topics that were asked were heap, priority queue, binary search tree, and in-depth C++ and OOPs.