And, finally, ask: 'Have I answered all your questions?'

Before you begin asking your questions, find out if there's anything they'd like you to elaborate on. You can do this by saying something like: "Yes, I do have a few questions for you — but before I get into those, I am wondering if I've sufficiently answered all of your questions. Would you like me to explain anything further or give any examples?"

Not only will they appreciate the offer, but it may be a good chance for you to gauge how well you're doing, said Bill York, an executive recruiter with over 30 years of experience and the founder of the executive search firm Tudor Lewis.

If they say, "No, you answered all of my questions very well," then this may tell you you're in good shape. If they respond with, "Actually, could you tell me more about X?" or "Would you be able to clarify what you meant when you said Y?" this is your chance for a redo.