There are five sections, called testlets, in the four-hour AUD exam. Testlets 1 and 2 are multistaged, multiple-choice sections, each containing 36 questions. Testlets 3, 4 and 5 are task-based simulations. Testlet 3 has two task-based simulations, and testlets 4 and 5 each have three, for a total of eight.