Amazon Software Engineer Intern interview questions

I applied online and got a mail from the HR for a telephonic interview. I was given an oppurtunity og select a slot from the listed available dates and time. There were two interview each lasting for 45 min with a break of 15 min in the middle. The firs interviewer was an Indian guy who was very professional. He tested me on a Java question related to an string anagram. The second interviewer was a Chinese female. It was a bit difficult to understand her accent. She tested basic computer science knowledge, data structure, java concepts like inheritance, polymorphism, things about garbage collector etc. In the end she asked me a data structure programing question about a n* n matrix wherein i had to turn the matrix by k places. I did give almost all the answers but I think my first interview screwed me. I could just complete one programming task in that 45 minutes.

2 Phone interviews, which each began with general, quick questions and ended with a half hour coding challenge.