Microsoft Software Development Engineer interview questions

First contact in a university campus recruiting event. Called for a short 1:1 interview (1/2h), then another short screening interview (phone). Then called for on-site interview in Redmond. I had 4 interviews (one hour each). Each interviewer was really nice and the whole interviewing process is smooth and respectful.

Phone Interview. If this goes well, you get schedule for all-expense paid trip to Seattle for onsite interview. If that goes well, you get an offer.