I was asked to attend a hiring event at 8:30 AM. My first interview round began at 8:45 AM and focused on Data Structures and problem-solving. I solved the problems and their further variants, and I thought it went excellently.

Then, I had to wait almost an hour before the second interviewer arrived. He mentioned he wasn't prepared and it was a last-minute arrangement. He proceeded to ask a math-related coding question. I couldn't recall the necessary property and needed help. It turned out the actual algorithm/coding required was almost trivial.

Again, I waited for an hour without any information. I then called the recruiter and was asked to go for lunch. After lunch, I had a Systems Design round. We started with a generic problem and moved to more detailed designs. I thought this round went well.

The interviewer mentioned they didn't have feedback from the second round yet, only the first. After this, I waited for a few more rounds and was told the feedback wasn't positive. I am pretty sure it was the feedback from the second round, and I feel I just wasted a few hours due to a lack of coordination on the recruiter's part.

I should mention that the interviewers were polite and nice to talk to.

Common algorithm questions. Distributed cache design.