Microsoft

First, an online test, and after that, an overall online interview. They asked for technical knowledge, logic, and algorithm understanding. They also asked about projects you've done and the difficulties you encountered in those projects.

I submitted a resume while at the Canadian Undergraduate Technology Conference. A recruiter emailed me shortly after, followed by a brief, fairly straightforward phone interview. This was followed by an invitation to fly out to Redmond for a day of

It was pretty easy. I got flown in for the interview and then had a relatively full day of interviews, including a lunch at their cafeteria. I interviewed with 4-5 people on the day of.