There is nothing that beats seeing someone's actual code, or having them do a live coding exercise. Even if it's pseudo-code.
Playing the quiz game is unrealistic, and you'll only end up with developers who are good at taking quizzes. I haven't really seen this be a good indicator of the developer's actual skill.
Now, if you're just looking for replaceable cogs, then I guess any quiz would work. Personally, I prefer that I work with developers who have good critical thinking skills and are able to elucidate their intentions when it comes to writing software.
"There is nothing that beats seeing someone's actual code", completely agreed. A good way to see this is to let some problems to be solved and sent with the curriculum, like those acm-icpc problems.
Playing the quiz game is unrealistic, and you'll only end up with developers who are good at taking quizzes. I haven't really seen this be a good indicator of the developer's actual skill.
Now, if you're just looking for replaceable cogs, then I guess any quiz would work. Personally, I prefer that I work with developers who have good critical thinking skills and are able to elucidate their intentions when it comes to writing software.