I took a quick glance at their website and it says:

"No non-religious head coverings"

Which makes me think that they record a video of you while you're taking it, which is kind of eerie.

That being said, it won't stop anyone who has a USB webcam you can just unplug, unless the software requires you to have a webcam plugged in and pointed in the right direction.

For higher value tests:

- Someone will watch you

- The entire session is recorded

- You hold up multiple forms of ID and rotate it / tilt it

- It's effectively a keylogger + mouse tracker + eye tracker + ..., basically malware

- Triggering any security features like looking "to the side or down" will result in human intervention asking you to do a 360 degree view of your room

- You are not permitted to cover or pause the video stream and you may be randomly asked to do things like blink or hold up fingers

- Yes, they can remote control your device

No need to unplug when a piece of tape or folded paper will do it. I'd be more worried about the microphone.

Unless maybe the requirement is to catch you looking elsewhere?

Or a phone...