Format
The exam is a nine-hour single-day computer-based test composed of eight question sets with 42-51 questions per set (352 multiple-choice questions in total). Each section is one hour long. The test taker is permitted 45 minutes, in total for the whole day, for the purpose of breaks that can only be taken between sections. There is a 15 minute tutorial at the beginning of the exam, which the test-taker can choose to skip, and have the time added to the break time. If the taker finishes any section before the alloted 1 hour time limit, the remainder of the time is added to break time. The test is administered at the Prometric testing sites around the world.
Read more about this topic: USMLE Step 2 Clinical Knowledge