2 Screenings : 1 onsite screen for 1.5 hours at Santa Clara Office. 1 phone interview for 1 hour. 5 hours of onsite. 5 interviews with physical design team. All the rounds were based on one single topic : Satic Timing Analysis. 4 rounds were ok, they asked different questions in STA to check my basics. 1 round was very difficult...that guy was the senior principal engineer. He said he was the consultant for all the groups in backend design. His questions were very tough. He tested my thinking, he wasn't looking for answers.