The purpose of the post-test is to assess your knowledge and verify your understanding of the topic’s concepts. However, the purpose of the module is for your educational benefit. Therefore, you are allowed to take the post-test twice, if needed.
If after taking the post-test the first time and you are not satisfied with your score, you may go back to review those sections in the module where you missed questions. You may then take the post-test a second time.