[mmcnickle]

If you want to avoid this kind of cheating, you need to approach the test as if it were proctored. Communicate the expectations up front: you'll be required to screenshare, have mic and camera on at all times, what resources they're allowed to access and which they aren't.

There are still dozens of ways to cheat even under the above conditions, but it should eliminate egregious copy/pasting from a LLM or in-person help.

Were it me, I'd have made the expectation clear that we were interested more in the line-of-thoughts and explanation than the code. The lack of communication would probably be enough to not take the application further.