Amazon Non Software Development Engineer interview questions

Online coding challenge, second one was close but not quite correct. Went through to 4 x 1 hour interviews (no phone screen), all virtual due to covid-19. 1. Not bad interview, two coding challenges (BFS, sliding window), typical amazon behavioural questions. 2. Weird interview. Was constantly walking around their house, carrying laptop while interviewing. Two coding challenges, both not too bad. Typical amazon behavioural questions. 3. Good interview, system design question, pointed in the right direction for possible tradeoffs. 4. Not a great interview, 2 coding challenges where the interviewer just didn't reply when I asked questions.