While answering this question be sure that the qualities you mention reflect you. For example, you can begin the answer by saying that according to you “Curiosity, Creativity, Problem Solving” will enable any aspiring individual to become a successful engineer. If you want you can also explain the individual characteristics of why you think only these three will help you become a successful engineer. Make sure you reflect the interviewer on how you have all these qualities and make him think that you are a perfect fit for the organization.