Instead of having separate tests, each with a static set of questions, most of our exams present you with questions from a larger pool of questions. You can retake the exam multiple times and receive different a different set of questions.
Later, you can review your exam results for each time you took the test. Reviewing your results helps you prepare for your certification test.
Tip: Consider re-taking exams, even exams that you pass, so that you can be exposed to more of the questions and further solidify your knowledge.