The interviewers want to make sure that all of your questions about the NHS or job role are answered during the interview. It is best to ask at least a question or two, showing the interviewers your eagerness to learn all you can. Of course, you want to review the job announcement and research the organization beforehand so you are not asking questions that could be found during your research. Additionally, now is an excellent time to thank the interviewers for their time and for letting you ask questions, showing you have manners and respect.