Amazon Software Development Engineer interview questions

This was a campus hiring process. First there was a written test, comprising of a few language based questions (C++), a few algorithmic questions, one database question and one design question. The next phase involved four face-to-face interviews. The first one was conducted by a Human Resources representative. They asked about a) why I wanted to work at Amazon, b) why I'd rather not pursue higher studies, c) if I have any preference of location, d) if I have any offers from any other company, e) any general questions about the company as such. The second one was a standard technical interview taken by a Senior Manager. It comprised of two algorithmic problems in which I was asked to write pseudo-code. I was asked follow up questions on the second one which I had to answer verbally. The third was another standard technical interview, but this time by an engineer. I was asked two puzzles (brain-teasers), and one algorithmic problem with follow up questions. I wasn't asked to write code. The fourth interview was also taken by an engineer but this was the architecture and design interview. I was asked one question to test my knowledge of computer architecture and operating systems. The second was an open-ended design problem (traffic monitoring in a large city). My CV wasn't discussed and I wasn't cross-questioned on my answers to the questions in the written test, but this may not be a standard practice. Overall, based on my level of preparation, I felt it was easy. In the end, they hired 3 out of about 10 shortlisted candidates (based on the written test).