Question

hey i need some sites that provide some good questions in C (the concepts that we mostly overlook).

Answer 1

You mean testing your basic knowledge on C, or some quick projects to do?

For basic knowledge, I would say that if you do all the exercises on the K&R book, then you practically know the language, including weird stuff like why A[5] is the same as 5[A}. There are also several newer books that will get you acquainted with the language.

With projects, I'd say come up with your own ideas and work on those, or go ruin someone's Open Source project.