What is the difference between - 1) Preprocessor,linker, 2)Header file,library? Is my understanding correct?

Question

Okay, until this morning I was thoroughly confused between these terms. I guess I have got the difference, hopefully.

Firstly, the confusion was that since the prepr

Answer 1

Yes, almost correct. Except that the linker does not links object files, but also libraries - in thise case, it's the C standard library (libc) is what is linked to your object file. The rest of your assumptions appear to be true about the compilation stages + difference between a header and a library.