Not that it matters to me or I am sad about it, but surely want to share, I was going through the interview process for MongoDB senior software engineer,

Had excellent screen round:

Q: Intersection of two sets: Solved in 30 min, interview over in 45, few followups

Had excellent round1: concurrency:

Q: Implement Read Write Lock: Solved in 30min using ReentrantLock and conditions, few followups

Had excllent round1: Non concurrency

Q: Word Break: Solved in 25 min, interview got over in 35 min.

Result: Rejected, no feedback