Multi Choice Type QuestionHow is a null pointer represented in C?Marks : 1Negative Marks : 0Answer hereNULL0-11

Analyzing the Choices

1. NULL: This is a common macro used in C to represent a null pointer. It is defined in several header files, such as stddef.h, and signifies that the pointer does not point to any valid memory location.

2. 0: The integer value zero is often used to represent a null pointer in C as per the C standard. In C, a pointer value that is equal to zero is considered to be a null pointer.

3. -1: This is not typically used to represent a null pointer in C. Instead, it might signify an error or invalid status in some functions, but it is not a standard representation for null pointers.

Final Answer

The correct representation of a null pointer in C is NULL. Both NULL and 0 are valid, but NULL is preferred for clarity. Therefore, either from the choices presented, NULL (or 0) is correct, while -1 is incorrect.

If only NULL is an option, that is the most appropriate answer.