My school is not one of the schools where Amazon recruits from. I started by going to the Amazon jobs site and applying to all the positions that I thought I was a good fit for. A week or two after I filled out my applications, I got an email from an Amazon recruiter inviting me to an on-site group interview (no phone screens prior to this). They flew me to Seattle, put me in a hotel nearby, and we (the other interviewees and myself) participated in an all-day coding exercise. I cannot discuss the problem that they gave us, but once we finished, we were free to leave. Spent the rest of the evening exploring Seattle, flew back home, and am now waiting for a response from them.