I'm not sure "custom-fit preparation" counts as not having good faith. If I was doing an interview process and was told the next step would involve a live codin

I'm not sure "custom-fit preparation" counts as not having good faith. If I was doing an interview process and was told the next step would involve a live coding exercise in a specific language/package that I wasn't already fresh on, I'd be cramming for it to a degree where my performance would mostly show how fast I can learn something and not my net level of skill in that language/package. If the hiring folks inferred the wrong thing from that, that's not my fault for studying based on the information and parameters they provided me.