Amazon Software Development Engineer interview questions

Contacted a year after applying for a summer internship (and not hearing back); they must have kept my resume on file. The first step was online coding problems. They were EXTREMELY easy. "Write a Java method that removes all vowels from a String instance" easy. It's timed, but you have at least twice as much time as you'll need. Don't sweat this at all. Then they fly you out to HQ in Seattle and the real interview starts. I believe it was four 45-minute-long technical interviews, led by actual software engineers (not recruiters). These questions range from moderately difficult to pretty tough. You will be WRITING CODE on a whiteboard (choice of Java or Python), so be prepared for that. Lots of questions involving various data structures and algorithms.