We advise to only use the fullscreen option when you're running the test in the classroom, and not when students are testing remotely. Read on if you want to know why.
The setting in a test
How does it work
When the test launches, the browser will ask the student to go into fullscreen mode. Exiting fullscreen mode will start a 10 second timer after which the test is automatically submitted, unless the student returns to fullscreen.
The fullscreen check can fail when a browser crashes or when the internet connection is lost. If this happens, the student is able to navigate away from the test and return later without any timing restrictions. In this case, you can see the event "Fullscreen was started" more than once in the Fullscreen events of the test.
Security
Please note that this setting is not 100% secure. For example, a student can quite easily use a second device or even a second monitor. Therefore, we advise to only use the fullscreen option when you're running the test in the classroom, and not when students are testing remotely. The reason is that it does not add much extra security to remote testing, but it does add some possible issues.
Possible issues
When a student has a screensaver and is inactive during a test, the screensaver might lock the student out. If the student does not return within 10 seconds, the test will automatically submit.
The message the users gets to see when he exits the fullscreen mode during a test.
Incompatibilities
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Although most major browsers do, not all smaller browsers support the fullscreen mode, like Internet Explorer 11, Android, Opera Mobile. Students will get a warning when the browser is not supported.
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The Apple IPad and IPhone are not supported, since they do not allow user input when the device is in fullscreen.
The Fullscreen test feature is not compatible with the question type "file upload", since users cannot leave the fullscreen for choosing a file.