Twelve questions. Get ten right and you know everything you need to sit down and play.
Your answers are not sent anywhere and there is no record of them. Take it as many times as you like — the questions are different every time. If you get one wrong it tells you why straight away, so it is worth doing even if you fail it.
It covers the five things that actually come up at the table: which hand beats which, reading your own hand, betting, table manners, and dealing.