In programming language discussions we hear terms such as low-level, middle-level, and high-level. How are these determined? Would C be considered a middle-level language?
Low-, high-, blah-level is all just vague terminology with no deterministic factor behind it. Traditionally, low-level languages refer to machine code and assembly, and high-level refers to everything else. More recently, we have "very high level" used for scripting languages (anything interpreted rather than compiled). I have never heard "middle" used for anything.
That said, you will hear lots of argument on whether C or C++ are low-level or high-level languages, as some people prefer to think of C/C++ as low-level now given their relative position to other languages (25 years ago this would be unheard of). It is largely meaningless unless you agree on a definition of low-level or high-level. So you could easily come up with a definition of "middle-level" and then use that to determine whether C counts as middle-level or not.