Amazon Software Engineer interview questions

Group interview. Started from morning. Three people a team. The team was given some reading material, and each person chose one part to code. During the coding process, the interviewers would ask for your solutions.

I've applied for a position in Amazon Fulfillment. They contacted me in a week and we arranged a phone interview. They did three technical interviews in total. The engineers who did the interviews were very kind and professional. However, after the last interview, which went fine in my opinion, I just lost contact. No feedback, no "You did good", not even "Thank you, we are not interested in you right now". After a month, I sent an e-mail requesting a feedback. They said that they will contact me in a couple of days, but they didn't. Overall, it was a waste of time.