Quizzes allow you two versions: Pass/Fail or Tally.
Pass/Fail quizzes allow you to check which radio button options are correct answers as part of the answer key at the end of the survey, then assign a percentage for the pass/fail line (such as 80% is considered passing).
Tally quizzes actually allow you to assign a point value to particular answers (checkboxes and radio buttons), allowing you to be given an overall score. Then, you can assign a scoring range in the answer key and provide different responses based on the score they received, such as 1-35, 36-70, etc.