Amazon Sr. Program Manager interview questions

First round was telephonic and lasted for 20 minutes, there were two such interviews and then once you clear these you move onto the final rounds which are 4 rounds of video conference rounds

I applied for this position and was contacted for it by a recruiter. The recruiter set up a time and stated the interviewer would be on time. Not early, not late. The interviewer was early. Unprepared. Awkward and his examples and questions were stilted and not thought through. It was a miserable interview and very awkward to try to guide and direct him as well as understand him. He was 40 minutes early and when I picked up the phone he acted like he was surprised I picked up the call. I believe he was trying leave a message and say he missed me as he was totally unprepared to conduct a meaningful interview. With that misery over, I expected a thanks but no thanks but I received another phone interview with an employee with 15 years history with Amazon. He was fantastic. We clicked very well and he was a hiring manager. We spent an hour and a half discussing all aspects of the position, his background, my background and next steps. Third interview was with another front line 2 year employee and it was not as personable or interesting as the 2nd. I was disappointed with the approach, the questions, the lack of reply to questions and the overall disposition and enthusiasm of the interviewer. I was trying hard as I thought an opportunity at Amazon would be very cool and career advancing even if for 2 years.