Amazon Software Engineer(Internship) interview questions

Went through two online testing phases. First one was easy debugging along with a set of logic-based questions. Second one was a coding challenge, not hard at all. They then gave me a technical phone interview, and they give you many dates and times to choose from.

Applied early December, got called in March for two back-to-back 45 min phone interviews. All technical, no behavioural questions. First interviewer was nice and tested on tree algorithms. Second interview asked a permutations question. He felt impatient and kept swaying me off in the wrong path.