What skills do you think would be necessary for a candidate eligible for this position?

The objective of this question is to gather information about your understanding of the career. The hiring manager wants to know if you are really motivated about being in this profession or is it just a short stint? Also, this question will give the hiring manager a better understanding about how much you know about this job.
For answering this question go through the job description properly before the interview and also do some research about the organization which has advertised the job. Mark some of the skills that you think would be used the most for this job and prepare your answer accordingly.