Here are some questions that show an interest:

☛ You may ask questions that are related to the projects/missions in which the company/team is working on now.

☛ You can also ask questions on duties and responsibilities for the said job.

☛ What are the next interviewing steps - the hiring process?

☛ Are they planning to check your references?

☛ When will the hiring decision be made?

☛ Share the positive things that you know about the company.

☛ You can also suggest sending samples of your work, if appropriate.