It was a phone interview with a hiring manager first. It took about one hour with questions about my background, my school, my resume, and behavior questions. It was a good opportunity for the manager to know me and for me to present myself. The most important thing is to know what you put on your resume and do not leave an impression that you overly decorate your resume. I got a on site interview invitation at the end of the phone call. It surprised me at that time since I thought they needed some time to consider my performance. 3 weeks later, I went to the onsite interview. The experience of the on site interview left me a very positive impression of intel. The interviewers were very nice and professional. I know one day interview can be exhausted, but I think I prepared it well. I rehearsed my presentation very carefully before I went there, so I think I did a pretty good job of time control. Most of the questions were behavior questions and technical questions of my presentation. In general, all discussion was of PhD level, so make sure you know what you talk about. The whole process of the on site interview took from 8:30 to 4:45.