Amazon Software Development Engineer interview questions

I was contacted by a recruiter through linkedin, had some email correspondence which was nice and quick, then a phone interview, after that I was given a programming test in Java using interviewzen. I had 4 hours to complete it. The programming test included writing a simple method, and make test cases for it.

I received the online test 1 month ago, the test consists of two algorithms and several multiple choice question. It seems to be easy. I will fly to Seattle tomorrow for the onsite.