Can I use kiosk mode on exam tablets?
Yes. Put only the exam app on the list, or use full-screen kiosk mode, and the tablet shows nothing else. Chrome and other apps are left off, so candidates cannot search. Attach it to the exam group for the exam window, then return the group to normal afterwards.
An exam tablet should do one thing. In Skie, you build an app list that contains only the testing app, or a testing app and a calculator, and attach it to the exam group. For a more finished lock, use full-screen kiosk mode.
Leaving Chrome off the list is the key decision. Without a browser, candidates cannot search for answers. Alternative browsers, VPN apps and proxy apps are always blocked in any case. Add policy switches that suit an exam: screenshots disabled, Bluetooth off, camera off if the test does not use it, Play Store hidden.
You can run it on a timetable. An exam window in a schedule applies the exam list for the paper's hours and returns the tablet to normal afterwards, and it must sit above the general school-hours window because the first matching window wins. For a dedicated exam hall, a group of its own with the kiosk attached works well.
Plan the practicalities. Test the exam app on a pilot tablet, confirm Wi-Fi in the hall, and remember that cached rules keep working offline. Fork the usual policy for exam week and attach the copy to the exam group only. Also decide who may change the lock mid-exam. A practical tip is to keep a spare tablet already set up as a replacement, since replacing a device keeps the student and group. See also exam mode on student tablets.