You can set the minimum passing score for your exam by navigating to the General tab in your exam settings and locating “Completion Certificate” under Presentation.
Here you can set the minimum score percentage that exam takers must achieve for certification as well as customize your certificate per your needs. To set the maximum allowed attempts, you need to scroll to the Order section and choose a number for “Number of Attempts Allowed”.
You can also restrict your learners from reattempting an exam for a specified period of time using the “Lock Quiz After an Attempt” option in Advanced settings.