It may sound strange but the focus of my interview questions is to encourage the candidate to express an OPINION which I hope becomes a STORY. To that end I'll ask questions that at a glance seem to be objective through a lens of sound bites on "best practices" but are really subjective. What is good code? What is good data? (And bad, of course.) Skills can be learned quickly to produce A result but experience gained over time will have wrought something more interesting.