well I've only experienced these questions in regards to a developer role - generally ones like "tell me why you're the best person for this job" or "why should we hire you instead of someone else with the same skills who is willing to work for less" to which my answers were - "there's thousands of people who can do this particular job you're asking be done, the guy I came down with here who's sitting in the lobby to also interview is one of them, I'm another" and "obviously if they have the same skills and are willing to work for less you should hire them and not me"

I didn't get either one of those jobs, now that I think of it.