This may sound like a very obvious starting point but it is vital for both parties to grasp exactly what it is needed from candidate in terms of skills and experience. Remember the whole point of the interview is to prove you are the person that they want and are looking for.
What scope is there for personal development at your company?
It is important to show any prospective employee that you are the type of person who is ambitious and is looking to move their career forward. No one wants to take on an individual who is going to be content to coast and you need to show that you are not coming along just for an easy ride. Any ambitious and forward thinking company will be looking for like minded individuals. Ask a question which will give you give the chance to show just how driven you are.
Is there anything you have seen in the other people on the shortlist that you have not seen in me?
This is a great question to throw into the mix as the interview is drawing to a natural close. I remember a candidate asking me this once and I had to smile because it left me with nowhere to go. As well as turning the tables on the panel it is also a great way of gauging just how well or how badly you have performed throughout the course of the selection process. You should always be looking to improve and getting feedback from an interviewer is a crucial part of this. It is a risky strategy to take because you might get an answer you are not happy with. But if you are prepared to take a risk, then this final question is a gamble that just might pay off.