The 231 number of questions (more quality questions soon!) in these mock tests are similar to the original exam and completely aligned with the PMBOK Guide - 6th Edition. The questions and answers are designed in such a way to find the gaps in your knowledge and to fill the same. The tests are bite-sized (only 48 minutes) saving you of the fatigue caused by sitting for longer hours. There is no use of taking mock exams which are 4 hours long unless it is the real exam. Some say that you have to train yourself to sit for the complete 4 hours by taking as many mock exams as possible with the original duration. But I do not agree with that as I myself have done it the other way. So, go ahead, grab a pen, paper, and a calculator, and attempt the questions to sharpen your knowledge and improve your confidence.