An interview session doesn't necessary consist of only the interviewer posing you questions. It also goes in the other way round at some points. During the interview, a time may come when the interviewer asks you, whether you have any questions to ask. This part of the interview holds a lot of significance and it is important for you to ask the right question. Failing to do so shows a lack of interest for the job on your part. This is a common mistake that job seekers tend to make.

Before going for the interview, you must have done a research on the company by going through the company website and other resources. You can use this research as a tool to prepare questions that you can ask during the interview. Based on the information available on the web about the company you can prepare some relevant questions. This increases your chances of impressing the employer and also help you gain relevant information about the company you have applied for so that you can take the best informed decision later.   

It is important for your prospective employer to know that you are genuinely interested for the job. If you sit like a bump in the interview without asking questions, it shows your disinterestedness for the job and the company. While, by asking interesting questions based on your research, you can easily prove your interest towards the job as well as create a good impression on the interviewer that you are well prepared for the job.

Certain questions that you can pose your interviewer can be about the specific tasks that will be expected out of you, the average day likely to be for a person in this position, the biggest challenges of the job role, whether the position is a newly created one or you will be replacing someone if selected, what would be the next step after the interview, what are the goals of the department you will be working with, how your performance will be evaluated if you are selected, the competitive advantages of your prospective company compared to the other similar companies in the industry, the best aspect about the company according to the interviewer, if you are selected for the job what can you possibly do to make the interviewer's job easy, do you need anything else to clarify and how do you compare yourself with the other potential candidates for the post.

Always remember that when you are asked whether you have any questions for the company, it is always wise to pose interesting questions than keeping quiet.