Amazon Senior Program Manager Technical interview questions

This was for an AWS position I had applied to through the Amazon career site. Five or six months passed before I heard back from Amazon recruiting, asking about my interest in starting the interview process. I went ahead although I was not sure I was prepared to talk about some of the specifics, particularly if they got into coding -- I have shifted away from that work for the past couple of years -- since I knew friends at Amazon who had been surprised with that kind of thing. I definitely focused in that kind of questioning, which in my case turned out to be the wrong are to concentrate on. Typically you will have two or three phone screens the third more likely if one of the first two were inconclusive). I went through all three, expecting the first to really beat me up. As it turned out, I enjoyed the first conversation a lot. The dev manager I spoke with was smart, candid, open to answering questions, and was particularly good at giving a rich overview of the job, the team, and expectations. The second phone screen felt like a disaster. I choked on details I otherwise knew the answers to, challenged by a developer to go over details about program management that were specific, academic, and seemed to have very "right" and "wrong" answers. I had trouble describing fairly simple processes, technical solutions, and so in, I figured that I had bombed, and that would be the end of it. A few days later the scheduler had me for my availability for a third phone screen, to my surprise. After an admittedly poor showing, I relaxed for this one, and it went well. This was a higher level manager who I liked talking to, and we went over some detailed TPM questions, possible scenarios, and a few broader "philosophical" discussions about how to approach conflict, roles and responsibilities, etc. I figured it was a toss-up, especially as I was missing the vertical background. A day or so later I got the curt "we're not moving forward, good luck" message. That was the only part of the process that put me off a little. I am not sure what exactly didn't work for them. I can feel okay about it, since they have 70k+ employees, are careening towards 100k, and have a P&E of something like 100:1. It is going to be a crazy place to work, and getting a good team can be a crapshoot. For what it's worth, this team was sharp and great to talk to, while the overall AWS environment sounds pretty nuts.