The operator used to get value at address stored in a pointer variable is

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The operator used to get value at address stored in a pointer variable is

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2) A pointer is

3) In which header file is the NULL macro defined?

4) What will be the output of the following C code?

 #include <stdio.h>
int x = 0;
void main()
{
int *ptr = &x;
printf("%p\n", ptr);
x++;
printf("%p\n ", ptr);
}

5) Which of the following does not initialize ptr to null (assuming variable declaration of a as int a=0;)?

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