Margaret,
Each time you repeat the same exam, you will see the same 200 questions, but in a different random order.
That's why we have a total of 8 exams for you: The questions in Exams 1-7 are all selected in such a way to ensure that they match the PMP exam content outline, which describes how many questions you have to answer in each of the five domains. Exam 8 does not follow this approach. Instead, Exam 8 is simply 200 ITTO-based questions, because people wouldn't stop asking us about "do you have any ITTO questions in the simulator?". So we delivered.
So in short: if you repeat an exam several times, then you will see the same questions again and again. But in a different order.