Maybe it's bad at proving how good a C++ programmer someone is, but it's good at seeing how good a programmer someone is. As the author says, he doesn't expect

Maybe it's bad at proving how good a C++ programmer someone is, but it's good at seeing how good a programmer someone is. As the author says, he doesn't expect anyone to get it on their first try. It's more a test of if the candidate can figure the answer out or not. Would you rather have someone who can figure questions like this out on their own or someone who will dismiss this as "trivia"?