Amazon Software Development Engineer interview questions

Coded with a team of 2 other people for around 7 hours to complete a project. The project was to code a sequence of advertisements in the most efficient manner possible given a list of advertisements.

Recruiter moved very fast. Heard back day after I applied, had first phone interview within a week. Phone interviews last 45min - 1 hour and are mostly technical - for 2/3 of them, I coded using an online collaboration tool for most of the time. Interviewers were very clear and explained things well, and were willing to give assistance in cases where I got stumped. Make sure to know a lot about time and space tradeoffs, big O notation, etc.