Amazon Software Development Engineer SDE I interview questions

Applied, got an OA. Did the OA a day later. Silence for about 5 days. Asked to update my ID photo. Received final invitation 4 days after that. Completed the final, 3x1hr rounds, had to reschedule the last round, and then did my last round the following week. Overall, had great experience with all of my interviewers and my recruiter was communicative when issues arose. I received my offer 4 business days after I completed my final round.

In a take-home exam, there were two questions related to strings. One question asked: given a string in which all characters appear an even number of times, find the lexicographically smallest anagram that forms a palindrome.