C Programming - MCQ Practice Questions

Which header file contains the definition of NULL macro?

What does #undef directive do?

In C99, which of the following is a valid use of token pasting operator (##)?

Which header file is required to use assert() macro in C?

What is the difference between #include <file.h> and #include "file.h"?

What happens when #if 0...#endif wraps a block of code?

What is the purpose of defined() operator in preprocessor conditionals?

What is the primary purpose of the C preprocessor?

Which directive is used to conditionally compile code based on a logical condition?