NeetoQuiz lets you control quiz retakes, so you decide whether a person can submit the same quiz more than once. Turn on Allow candidates to re-take quiz under Candidate access and progress to permit multiple attempts. Leave it off and each person can attempt the quiz only once.
The setting applies to sign-in required quizzes, where each attempt is tied to the same login. Allow retakes for practice tests and training modules, where learners improve by trying again. Keep a single attempt for final exams, certifications, and hiring assessments, where the first submission needs to count.