Amazon Software Engineer interview questions

The first phone interview is from the hiring manager. He asked me some coding questions, such as finding two integers from an array which sum to a given number, how to store IP addresses. The second phone interview asks a bunch of information retrieval questions.

One hour interview. Was asked to describe my previous projects, what were the challenges, how do i approach them, what do I consider as my best achievement so far. He described the usual problems they solve in their department. Overall very pleasant and polite person. Apologized for asking to write code and read him over the phone, but it was not a problem to me.