What's the ultimate interview question?
Well of course there isn't just one. The ideal interview questions should be based on the topic at hand. It should relate to the individual or position for which the interview is being conducted and the desired outcome of the interviewer. However, if forced to choose, the absolute best interview in the world question you could ever ask is... why?
When you ask the question why the interviewee is forced to think. It forces them to think about the context of the question and then give a thoughtful answer,. more than often resulting in greater than a single word response. You can never go wrong with "why?"