What are they whining about? Having a list of questions they might be asked makes it easy for the teachers. They can prepare and will not be put on the spot. If they have answers for the questions, they will be ready. If they don't have answers, they can research them. A teacher should not be afraid of a few questions. If the theory cannot survive questions, it is not much good as a theory.
Indeed!
Maybe they are stressing about it because the questions can't be answered.