When I interview a new C++ programmer, my favourite question is not about const-correctness or virtual tables, but: "Do you comment your code?". I still ask about virtual tables, but asking about code comments always springs some interesting discussions and gives me a good insight about the level of care the aspiring programmer puts in crafting his code to not only make it correct and fast, but also to make it easy to work with. I witnessed puzzled faces wondering if that was a trick question (yes it is), and one unlucky candidate pushed his luck to a very bold "which good programmer doesn't comment his code!". Me.
