Do you literally mean 1) C++, 2) just a lower level language with control over those or 3) reading the relevant libraries or system code implementing IPC etc. (isn't it in C not C++?)?
Do you literally mean 1) C++, 2) just a lower level language with control over those or 3) reading the relevant libraries or system code implementing IPC etc. (isn't it in C not C++?)?
Another great measure is knowledge of (Linux) systems programming, this also tends to weed out people with inferior understanding of, you know, programming and deploying software on actual computers. The interfaces here are obviously in C.
There are many things that aren't congruent with C++ ability, such as general functional programming ability, or hiring for JS frontend or Erlang roles and such, but for most industry jobs, it's a useful determinator.
I don't know any good C++ programmers that aren't great and all-rounded overall developers. I can't say the same for any other language or technology.