Some people wonder if the contestants are given at least a heads-up on what categories will be on their game. Nope. They have no idea what the categories will be until they’re revealed at the start of each round.
At the beginning of the day, before they taped the first show, we all got a chance at a few practice questions so we could get a feel for the buzzer and the timing—about five or six questions each. Those questions were not remotely related to any of the categories that would appear on that day’s tapings.