I would guess that Ruby and Python programmers generally know at least some c, c++ and maybe even objective-c. That was the case where I worked. It is also norm

I would guess that Ruby and Python programmers generally know at least some c, c++ and maybe even objective-c. That was the case where I worked. It is also normal enough to install gems with native extensions, if you can’t read gcc or clang compiler errors you won’t get very far.