Amazon Sr. Software Engineer interview questions

Was called by the recruiter and an online test scheduled. It was a difficult tree traversal and manipulation test. One test case set with values and the expected output was provided as a sample. I was not prepared enough with the APIs and so lost out. Overall it was a positive experience with the recruiter

Three phone interviews: 1 with recruiter and then 2 technical, full day on-site interview of technical questions. Only allowed to interview one team at a time which is a bit unusual for a large company. Promises of being able to interview on other teams afterward was false. Other teams had directly (direct contact) expressed strong interest if first team wasn't a fit, but emails now go unanswered.