Team collaboration is a key part of most jobs so it's important that you give an overall positive reply to this question. If you have difficulty working in a team environment, that is okay; however, you need to show the interviewer that you are capable of offering flexibility between a group setting and working autonomously. In the end, the interviewer wants to be assured that you are capable of working positively, in a team environment.

If you have difficulty working in a team environment: "Depending on the scope of the project, I sometimes prefer to work autonomously; however, I am more than capable of being a positive and contributing member of a team based project."

If you love working in a team environment: "Personally, I thrive in a team environment. I see team projects as an opportunity to learn new skills!"