Ask HN: Amazon internship interview - what to study?

I have recently received an email stating that Amazon would like to interview me for an internship position. I know that this job is highly competitive but is an incredible opportunity! I want to know even if I don't get the position that I tried as best as I could to get the job.

I have about a week and a half to prepare. What should I study?

I have assumed doing some code challenge exercises online and reviewing sorting algorithms. If anyone has any suggestions or resources I would love to hear from you!