So you want to run a high stakes exam on Moodle using the Quiz. You want to ensure that the learners taking the exam cannot access any other materials while doing the quiz.
This article looks at Respondus - a safe exam browser and how it can protect a Moode quiz being carried out on an iPad.
The article also illustrates a number of other solutions available for Windows and O/S. Who knows this could mean the removal of memory sticks and alternative usernames for controlled assessment tasks?