First round was on campus. The interviewer was kind, and the problem was straightforward recursion programming problem.. I got noticed to have on-site interview on the next day after first round ended. The on-site interview had 4 rounds. Problems in first two rounds were not very hard. In the third round, I interviewed with a project manager but didn't do well. He asked me what was the most difficult problem I solved while preparing for this interview, and need me to explain the whole thing. I messed up since I forgot how to solve the problem I told him. The fourth round was a quite easy binary tree problem but my brain was not functioning well until interviewer gave me tips. Overall, I think the interview process was quite long and intense, though the coding problems were not hard. It's the PM that's hard to deal with.