Very smooth and kinda average difficulty. but if you prepare well, all will be fine. There are tao interviewers from different departments. The interview takes around 1 and half hours.

The interview process was daunting -- the agenda was unclear and the interviewer was called in from a different department with very little knowledge on the job that I was applying for. He also asked textbook questions and quizzed me like it was an exam. I was fine with it but felt that the interview process was not well thought through.