Prevent learners from switching tabs or windows during the test.

To restrict your learners from switching to another tab or window, go to Contents > Courses > Selected course > Select the quiz > Click the Continue button.
Click the "Settings", once you've entered this page.
Choose the Quiz Configurations option located below the features.
Once you reach this page, scroll down and select the Switch Window Restriction - Aid to Live Proctoring option.
Once you've enabled the switch window restriction, you can set a warning limit for your learners. Enter the number for the Switch window warning limit.
If they ignore these warnings, their quiz will be submitted immediately in the case of malpractice.
Once you've entered all of the necessary information, click the Save button.
Your students will now be unable to copy and paste text when taking quizzes. Furthermore, if they switch tabs immediately, they will receive a warning message.

You can use the tab/window restriction and copy-paste restriction feature to improve quiz credibility. Students will be monitored and not permitted to switch tabs or windows while taking quizzes.