It will of course help to know about the company to answer this question. They will ask you this question to find out if you are well rounded person or not.
Don't forget that it's very ok if your hobbies are not the same as others.
You must be honest as usual, do not lie about your hobby as this could create problem for you in the future. If you say something that you don't really do as a your hobby can make the interviewer suspicous and ask you more questions about it during your