Amazon Software Development interview questions

The company visited our college campus to hire interns in August'15. There was a 1.5 hour online round having 2 coding questions and 18 aptitude questions. The shortlisted candidates went through two personal interviews lasting for 45-50 minutes each. They ask you to write codes in language of your choice, so practice writing codes of what you prepare. Think aloud and try to be interactive with the interviewer.

I got an email from HR, and asked me any interests working at Amazon. Then, I schedualued a phone interview with hr. Three days later, hr email me passed and took another interview with sde. The interview still took by phone. All the questions were programming, nothing about my research and class projects.