Good questions are those that show that you not only want the job, you are prepared to knock the ball out of the park once you have it. So ask, “What would a successful year in the job look like?” or “What did you most value in the person who left?” You’ve done a Google search of the field and the company, of course, and one of your questions could be about emerging trends. Interviewers love it when questions relate to them and their accomplishments (“I’ve heard you made some exciting changes recently. What has the outcome been?”).