C Programming Language

C Language Pre-Processor

⛪ Programming Language > C Programming Language

Evaluate your understanding of the C pre-processor with these multiple choice questions. Learn about the different macros and pre-processor directives in C and how to use them to write efficient and organized code. Take the quiz now!

The C Preprocessor is not a part of the compiler, but is a separate step in the compilation process. In simple terms, a C Preprocessor is just a text substitution tool and it instructs the compiler to do required pre-processing before the actual compilation. We'll refer to the C Preprocessor as CPP.

All preprocessor commands begin with a hash symbol (#). It must be the first nonblank character, and for readability, a preprocessor directive should begin in the first column.

Q 1: What will be the output of the program? 
#define P printf("%d\n", -1^~0);
#define M(P) int main()\
             {\
                P\
                return 0;\
             }
M(P)

  • A 1
  • B 0
  • C -1
  • D 2

Q 2: For which of the following,

  • A #define PI 3.14
  • B char *PI =
  • C float PI = 3.14;
  • D Both (A) and (B)