Do you have any questions for me regarding this role or this organization?

While you can always follow up later with any questions you think of, this is the best time to have them answered. Ask the interviewer about any aspects of the job or company you are uncertain about. You can also use this as an opening to ask the interviewer about something you saw on a social media profile, in a news article, etc.

"When you told me a bit about the company's HR structure, you mentioned there is a separate 'Talent Development' department. I was wondering if onboarding falls under the Talent Acquisition or the Talent Development department."