Amazon Data Scientist interview questions

A very, very long process. 2 phone screeners, in the space of 3 weeks 1 resume based(I had relevant experience) and the other had a coding component(I was given the option of SQL, SAS, R and Python) and a Market entry case. After this stage, I had to wait a 6 weeks before I got a call for an onsite interview. Onsite, I had 6 back to back interviews. Each interview tested at least 1 leadership principle and also tested problem solving skills. The first interview had a really simple case question that I royally messed up with complicated thinking(I am almost certain that this cost me). The second interview had SQL. My lunch interview went a little awkward because my interviewer decided to throw a probability based puzzle out of the blue in the last 5 minutes and I couldn't solve it in time. Post lunch, everything went quite smooth, I was asked a forecasting based case, about Holt-winters method and ARIMA. 3 days after interviewing, I got a call where the HR started off by saying "The team really liked your background and experience and were impressed by you BUT, have decided to not move ahead" When I asked for feedback, there was none given to her. So after around 9 weeks in the process, felt a tad devastated to get a reject, I had invested a lot of time and preparation for Amazon.