There were two rounds of phone interview followed by an on site interview. On the first day there was a tour of the site and the area. The second day consisted of research presentation followed by a number of 1:1 interview.

I got the chance to interview through college/campus recruiting event and was selected for an onsite. For unknown reason, one of the interviewer did not show up in the panel interview, most of the interviewers are nice and friendly except one senior person intentionally behave like a "tough" guy asking "tough" questions.