<p>I am unaware about Duke in particular, but if assuming that most college interviews are the same you can really compare it to a friendly talk with one of the teachers you like. There shouldn’t be any pressure and you should really just be yourself. The interviewer might puzzle you with a few questions like “List 3 adjectives that describe you the best” and “Name 3 of your worst qualities,” but just stay true and keep your cool.
Good luck.</p>