There was 2 technical interviews with the same questions. All about Linux socket programming and syscalls. Interview is easy all about socket layer. Guys there don't understand interviewing process and just want you to answer simple questions.

Had 3 phone interviews. 2 technicals and one managerial. Technical interviews were all about networks and socket programming. So, before you proceed make sure that you know how TCP connection is established, how DNS works, what are control and congestions windows, etc. Also, got a test task and 4 days to complete it.