Amazon Software Engineer interview questions

Had initial interview with recruiter. After about two weeks had 2 technical interviews over the phone. Interviewers were very nice and tried to help, mostly discussing algorithms and presenting code solutions. In few weeks were offered to visit their office. Had about 5 interviews in a row, mostly technical and also with manager. Everybody was very friendly, open to discussions and questions.

After one online assessment, I got an onsite interview invitation. The interview contains 4 rounds of technical interview, one of them has two interviewers.