When I was doing C++, one of my interview questions was an open ended one: "std::cout << "Hello world!" << endl;" What exactly is this doing, lets dive in to ho

When I was doing C++, one of my interview questions was an open ended one: "std::cout << "Hello world!" << endl;" What exactly is this doing, lets dive in to how it works. You touch on kind of a lot here, and its pretty esoteric to even devs with 3-5 years experience. functors, operator overloading, namespaces, passing by reference to make the << chaining work, there is a lot you really have to know that is non-obvious. You can even jump into inheritance, templates and such if you really want to dive deep. I thought this was normal after doing C++ for ~11 years, but when I finally broke out of the Stockholm syndrome and started a job working in other languages, I find it absurd how complex, or maybe a better way to put it is, how much language specific trivia you need to learn before you can even begin to unravel how a basic hello world! program really works.