Amazon Software Development Engineer interview questions

Throughout the interviews, the focus was almost entirely on Data Structures, Algorithms and problem solving. First, there was an online test with 4 questions and about 2 hours time. We had to write code. Then they called me to their office for interviews. There were 2 rounds of interviews (lots of waiting, took almost 12 hours to get done) with a panel of 2 members each. Then, there was a phone interview with the hiring manager, and then one more interview at their office. One good thing about the interview process was that the HRs conveyed the feedback from the previous interview immediately and kept me posted on how many interviews remained.