After all, you have to answer questions one by one, no matter how many people interview you.
If it is a group interview, when you answer one interviewer's questions, make sure you also have eye contacts to other interviewers. Make all the interviewers involved. If you only talk to one interviewers mostly, other people may feel ignored and give negative feedbacks.
Actually, group interview has one advantage. For some very tough technical questions, you may get hints and helps from other interviewers.
