I've always favoured the "What if" questions.
Obviously, no one expects you to know everything as you have not yet been trained in the specific codes of conduct of that particular workplace.
But they're more looking for your ability to assess conflicting obligations and the thought process behind why you may take one course of action over another.
Everyone is going to toot their own horn at the interview. This is closer to directly asking someone how intelligent they are, what their problem-solving skills are like, without giving them as much of an opportunity to straight up lie to you.