Cisco

The first round was not bad. Only a single tech lead was present, asking basic C programming questions. The second round was quite long and painful. It consisted of three 1+ hour sessions with two interviewers, some of whom were the hiring manager.

Consists of three rounds of in-person (face-to-face) interviews. First round: C and data structure questions and basic networking questions. Second round: OS concepts and IPC mechanisms. Third round: Networking concepts and design questions.

I had five rounds of technical interviews and one round of general interview. Mostly, I was interviewed by Principal Engineers who tested my design skills and networking concepts. Although they don't expect the exact solution to the problems, they l