Amazon Software Development Engineer (SDE) Intern interview questions

The interviewer asked a few situation-based questions like "tell me a time when you worked in a team and something went wrong and how did you proceed". After that there was a programming question - I needed to solve the balanced parenthesis problem by reasoning in real time and in front of the interviewer. Although the interview itself went nice, I applied for Amazon at the beginning of September, then they got back to me in December by providing only 1 possible day for interview. After the interview, the emailed me with rejection quickly but did not provide any feedback.