Amazon Software Engineer interview questions

I attend a group interview. A big problem had been split into three parts and each one of the group selected one part to finish. There would be two one-to-one interviews inside the process.

Applied online after meeting with the recuiter at my school's career fair. Set up a 45 minute on campus interview. Met with two interviewers who asked me a difficult coding question. I wrote my solution up on the white board. They didn't ask me any others questions. I recieved the decision quickly after my interview (the next day).