As an experienced software development manager, you should already have a program to keep yourself informed of new developments within the industry. Describing this to the interviewer should be secondhand nature. However, now that you are aware you may be asked this question, you may want to organize your thoughts around the sources of information you use, how frequently you take time to update yourself, and the benefits this provides you. As with any question, the better prepared you are, and the more organized your answer is, the better you will perform during the interview.
