Throughout the interview, you will likely be working on setting yourself apart from your peers. When you answer this question, you have to do the same thing. This means focusing on skills, accomplishments or experiences only you have. Saying something like, "I am hardworking and positive" is far too cliche. It will not help you stand out. The majority of the other applicants may say the exact same thing. Take the time before you go into the interview to really think about what makes you different from the other candidates. If you simply cannot think of a unique attribute, there may still be hope for your answer.