The PMP exam is a computer based exam with 200 multiple choice questions. This means that each question has exactly one correct answer. The exam will give you exactly four hours to answer these questions. If you prepared well, this should be a breeze. Most find four hours to be more than sufficient for the exam. (It took me 3 hours and 58 minutes because I wasn't feeling well on that day.) Out of these 200 questions, 25 questions are pretest questions. These are randomly places through out the exam and are used for research purposes.