Amazon Software Engineer interview questions

2 phone interviews so far. 2nd one was so positive and complimentary I thought I'd be moving on but then no responses from recruiters. Fine if I don't get the job but at least be professional and respond. Maybe they're too busy or just move on to the next person? Not sure if they communicate well with each other.

I took an online assessment (~45 minutes) that tested logical reasoning and basic programming skills. I then took another online assessment (~3 hours) that consisted of a work simulation followed by some more difficult programming questions. The whole process took a couple of weeks from start to finish. I thought the questions were fair in difficulty given the allotted amount of time.