Amazon Software Development Engineer interview questions

Applied through the university's career website (essentially a resume drop), was later invited (via email, I think) to set up two on-campus interviews (45 minutes each, back to back). Met with one interviewer at a time: solved a problem, wrote some code and pseudocode, discussed modifications, trade-offs, runtimes; ended with a few minutes for questions. Got the decision within a week or so after that.

First, I got an online assessment. It contains two algorithm problems and several logic problems. After about two weeks, I got an onsite to Seattle. It's four round back to back interview. The interview is not quiet hard. Something about BST and OOP.