This demo quiz code screen simiulates what happens when a student enters a quiz code correctly (in this case, we've prefilled the box with the code "demo").
It also demonstrates what happens when a non-existant or inactive code is entered.
Please note, the demo you are viewing does not have in place the various security applications we enforce once the app is properly deployed.
As such, this demo should not be used in any production environment. It's just a demo. No more, no less. ;)