I applied through university. The process took 2 days. I interviewed at Amazon (Penn State University, PA) in Nov 2012
Interview
Attended the career fair at my school. Met with one of the recruiter's that was there. We talked for a bit and he took my resume. Got a call later to come in for a one on one interview the following day.
Interview was held in the career center on campus.
Interview questions [1]
Question 1
Main question was verifying whether a binary tree was a BST, given the function header that looked like public boolean isBST(root). He stated no other functions could be created and that child nodes did not have links to their parents.