Good closing questions do two things: they give you real information, and they signal that you're seriously evaluating the opportunity, not just hoping for any offer.
About the role
"What does success look like in this role after the first 6 months?" and "What's the biggest challenge someone in this role would face right now?"
About the team
"How would you describe the team's working style?" and "What's one thing you'd change about how the team currently operates?"
About growth
"What does career progression typically look like for someone starting in this position?"
About the company
"What's something about the company culture that surprised you after you joined?"
Avoid asking anything you could have easily found on the company website — it signals you didn't prepare.
Emeka Okafor
Career Coach & Interview Trainer
Emeka runs PerfectCareers' mock interview program and has trained candidates who've been hired at banks, telcos and startups.