These seem like pretty obvious questions. I'm pretty sure that if I just wanted to find out if a prospective employee had a basic understanding of the platform or technology I wanted to higher him for, I could think of a question or two myself.

Lisp: What is an s-expression?

Python: Why are tabs verboten?

I'm not sure what you'll prove with them; if he misses one, he is probably incompetent, but if he gets them all, you still don't know if he is any good.