I applied through an employee referral. The process took 4 weeks. I interviewed at Amazon in Oct 2012
Interview
There were a 2 weeks delay between interview sessions. The questions were basic. The interviews were technical in nature. Object Oriented Programing, Data Structures, Algorithms and Complexity are your friends.
I applied through college or university. The process took 5 days. I interviewed at Amazon (Waterloo, ON) in Oct 2012
Interview
The interview process was done through JobMine (Internship - I'm from Waterloo). The two "stages" were 45-minute technical interviews with two current developers on the team. Most of the code is on paper, but in some cases algorithm analysis and runtime analysis (big-O, specifically) is considered in your solutions. Be prepared for many questions on data structures and their implementations.
In the coding problems, they ideally want you to work in Java or C/C++. I did stuff in Scheme, which they did not appreciate.
Interview questions [1]
Question 1
In a collection of strings, output the string that occurs most often.