We want you to feel confident enough to express your own views and talk about your own interests. The whole point of interviews is to give the interviewers a sense of the individuality and potential of each student - something that no exam paper can reflect. In our eyes, one of the justifications of the interview process is that these interviewers are the same people who will teach you, and organise your studies, if you do get a place at Fitzwilliam. They will be responsible for you academically. They have good reason, therefore, to be looking for talented, stimulating, and, perhaps above all, enthusiastic students.
Interviewers are usually delighted to find subjects that arouse enthusiasm.
Too often, candidates have not really considered, before an interview, what they might want to talk about. Interviewers should give you the chance to tell them what these topics might be. You should expect to be informed in advance if such an exercise features as part of an interview. If it does, it is designed as much to be a stimulus to discussion as a test of knowledge. Even here, we are less concerned that you give the 'right' answer than we are with your intellectual curiosity, and your ability to grapple with problems whose solution you have not already been taught.