Amazon Software Development Engineer interview questions

Applied a SDE position online. An HR lady contacted me in a week and scheduled the first phone interview. The interviewer asked me to say a little about my background. Then asked questions focused on algorithm, time and space complexity, and a ransom note problem. The second interviewer asked some questions of hash table.

I applied using the university system and the interview was scheduled through that. There seemed to be some problems with email communication since I would occasionally fail to receive emails that were sent to applicants. There were a lot of interviews on campus (I think they interviewed at least 50 people within 2 days) so everything was well-automated. The format was 2 back-to-back 45 minute 1-1 interviews with developers from different teams. In general, I would recommend brushing up on basic algorithms and also reading up on Amazon services, especially all the web and cloud systems.