2 phone + onsite. they do a lot of linear, mixed integer programmings. knowing forecasting is also a plus. there is no coding questions in the phone interview.
Interview questions [1]
Question 1
in the onsite, be prepared about behavioral questions. Be sure to read the Amazon leadership statement before your onsite.
I applied online. The process took 1 day. I interviewed at Amazon in Jul 2011
Interview
The first interviewer did not show up and the recruiter rescheduled another one in the following week. Asked non-technical questions and current job responsibilities. No follow up