The process took about 1 month and half. I had two rounds of phone interview and one final round of phone screen, all technical and one hour for each. The interviewers were very nice and friendly, the entire interview process was pleasant. This position requires candidates to have advanced knowledge of computer architecture and operating systems, interview questions were also based on these. I didn't get the offer but I really enjoyed this interview process. Hope you guys all the best, please make sure you get all the basic concepts clear such as cache coherence, NUMA architecture before you go to your interview.