Comment Re:Not THAT surprising. (Score 1) 305
You should try code reading (not walkthrough): give the candidate 15 minutes on his own to browse the source code of a small library in an IDE of his choice. Afterwards, ask him what the library does and how. I've done this more than a hundred times with candidates and it turned out to be a very good indicator for how good they are as programmers. My brainteaser-question however turned out to be pretty useless.