Initial phone call screening by the hiring manager. It included a couple of technical questions (networking and generic) and a couple of coding questions (which were trivial if you have done LeetCode/CTCI).

Later, I was called for the onsite interview. There were about 4 rounds of interviews, all technical and involving whiteboard coding (requiring the best runtime). At last, there was a system design question round (which surprised me, frankly).

At the end of the round, the interviewer was rude and said directly that they were not happy with my performance.

LeetCode coding questions, brain teasers, and system design questions (data center related).