alt Hacker Newsi used something like this in unstructured technical interviews all the time.
"you type a phrase into google search, you press enter, get some results. tell me, in technical detail, what happened in that chain of actions"
the diversity of replies is fascinating, you learn a lot about a "full stack" candidate this way.
Feynman's classic "Why?" chain: https://www.youtube.com/watch?v=36GT2zI8lVA
I'd probably spend at least 20 minutes just to get through how the keyboard works, much more if it's a USB-HID device.