[heavyset_go]

My least favorite is "let's implement something that's really easy to implement if you've spent time thinking about it or working with it before", except you don't get the time to think about it and you're judged poorly for providing anything other than the "obvious" optimal solution.

[deadmutex]

Yeah, I have encountered this myself in the past as well -- a subject matter expert that has worked in the domain for a decade and asks you about how to solve problems in their domain (while the actual position is a generalist one).

Luckily, I was able to remedy this a little bit by brushing up on common system architectures used by companies that I was interviewing with.