First round was a phone interview through university recruiting (behavioral questions). Got the results within two weeks that I made the cut. Then the long wait began... Months later, I finally got another call for the second round on-site interview in Redmond, WA. In Redmond, they got me a rental car and nice hotel. Very beautiful city... I had a total of 4 interviews. The first was non-technical, but the rest were technical. So be prepared to code. The people working there were nice and they seem to have flexible work schedules.

Three rounds of interview starting with phone screening, middle round of online interview and final round of three interviews all schedule within a couple weeks time. Interviews were Microsoft recruiters followed by employees