Amazon Software Development Engineer (SDE) I interview questions

include 1 phone interview and 1 onsite. phone interview includes some medium algorithm problems, onsite include 5 rounds. 1 algorithm, 1 tech-specific, 1 behavioral, 1 lunch, 1 system design. The overall process take 1 hr for

5 rounds each 50% behavioral 50 % code. code questions were pretty clear and the interviewers had take time to fully explain if you ask but they don't give the full problem definition at first. one round had an object oriented question which I implemented and the interviewer was not satisfied with and did not point to the problem in my design which felt a bit arbitrary