Amazon Senior Software Developer interview questions

I was contacted by a recruiter through a Job search website for a full time position. The response after each interview was super quick (relative to interviews in other companies) Once they reject you, seems like the recruiter don't respond to your mail anymore. Pretty rude and unexpected. 1st phone call was with the recruiter. A 20 minutes conversation. Later he scheduled a day for phone interview. 1st round was a 45 minute technical phone interview. It went well. The interviewer was supportive and knowledgeable. I enjoyed the interview. In couple of days I was told that they want to go ahead with onsite interview. I was thrilled and set a date for 3 weeks later. I hated the onsite interview process. I liked that they paid for my travel(from California) and the stay at downtown. The onsite interview was of 4 hours - 5 rounds and NO BREAK for me in between. Why no break? Because the interview started 15 - 20 minutes late and that's why every next interview got overlapped and the interviewee had to suffer. It was utterly exhausting for me and frustrating after 2.5 rounds. I was interviewing after 9 long years and that's why I was uncomfortable, I guess, to ask for breaks in between. But if you are reading this and face similar situation please ask for breaks after every interview.

I was contacted from linkedin, asked if I'd be interested in interviewing. Had first phone interview after two week, asked for some technical question (algorithm complexity calculation,etc...) no personal questions. Second phone inteview, asked for personal questions (quite all about Amazon Leadership principles). Third interview, other technical questions (more specific). Total of 3 phone interviews. Took about 3 months start to finish. The interviewers were wonderful. Very smart.