Amazon Sr. Project Manager interview questions

After the first interview, I was invited to the 'final interview' which consisted of five one-hour interviews over two days. The email from HR strongly recommended that I view a dozen hours of YouTube videos, read white papers, study the 14 management principles, and prepare interview answers using the STAR method, which I did. I learned that AWS had turned down four earlier candidates, so I started to wonder if I was wasting my time. In all, I invested 60 hours of preparation time and obtained an AWS architecture certification. They declined anyway me without explanation. Thanks for nothing, Amazon.