Amazon Software Engineer Intern interview questions

Was contacted by an amazon recruiter to set up a phone interview. Set up two dates for two separate phone interviews. I submitted my resume online and at a career fair not sure which one got through to HR. People at Hr were very nice and so were the interviewers. Friendly over the phone and helped calm my nerves during the phone interview.

Applied online last year, got an email asking for my availability in January, but got back to me with the interview process in March. 2 phone interviews, each about 45 minutes. Both are technical based. The first one asked a lot of complexity and data structure questions, and the second one asked some definitions and coding. I felt alright for the first interview, but the second one just sucked. And I felt like the interviewer wasn't very good at communicating with people. Topics covered in the interview: 1. reverse linked list 2. hash table 3. binary tree 4. Fibonacci sequence 5. chess design