Amazon Software Engineer interview questions

I had four rounds of interview for this position. I was asked various questions relating to data structures especially HashTables. They also asked me questions related to my resume. The HR was not very prompt in communication.

There were supposed to be two phone screens, then an onsite interview. I only made it to the first phone screen. This was my first time interviewing, so I obviously had a lot of reviewing to do. It's really important that you verbalize your thought process, and this is where I was greatly lacking. The interviewer was friendly and was willing to discuss/walk through the problems with you.