Amazon Software Developer interview questions

I went to Amazon for a on-site interview. It is a group interview. Three people are assigned into a group and assigned a programming question. The question is separated into three parts. Each individual can choose one of the parts and use any language you want. It gives almost four hours to finish the task and during this process, you will be interviewed by an employee about thirty mins.

I was contacted by Amazon recruiter via LinkedIn for an open position in their transportation department. It took them two months (or maybe more) to schedule two phone interviews, and after that they invited me to their Seattle headquarters for the on-site interview. The on-site interview consisted of five interviews including an interview over lunch with a manager. I was interviewed by three engineers, the hiring manager, and the director.