Amazon Software Engineer 2 interview questions

I was taken through an interview process consisting of online assessments, phone-screening with a recruiter, then a final round of 3 coding interviews and a system design challenge. Most of it was pretty standard, except the system design interview with the hiring manager, where I was asked to design a scaled-down version of the system I would be working on if I was hired. This feels like a fairly biased question since the interviewer will already have a solution in mind already.