Nothing specific stands out - if you've ever done a PM interview (either give one or taken one) with any big company, you know the kind of questions you'll get. "Tell me about a time things didn't go as expected", "tell me about a time you had to take an unpopular position", etc. There were two "design a solution" questions, but nothing specific (nothing like "what specific HW would you use" or "what language would you use" - remember, TPM role, not Engineer role). They were of the form "how would you do x if your customer asked you for it". Since they were things I hadn't done before, I tried to think of all the things I would need to know, learn, ask, and figure out to implement the solution. Amazon makes a difference between a Technical PM and other PM's, so YMMV if it's not a TPM role.