You can require candidates to answer questions one-at-a-time without the ability to go back and revise answers for any section. Enabling progressive loading reduces the likelihood of cheating by preventing candidates before submitting any answers.
To enable progressive loading, navigate to an Assessment, click Edit and then Settings. Toggle progressive loading for any section.
Without progressive loading enabled, candidates will be able to see all questions at once:
With progressive loading enabled, candidates will only be able to see one question at a time: