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C LANGUAGE
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Pointer in C Language

This Test will cover Pointer in C Langauge, including declaraction and initialization of pointer, pointer arithmetic, function pointer, pointer to array etc.

Q. If a variable is a pointer to a structure, then which of the following operator is used to access data members of the structure through the pointer variable?
Q What will be the output of following code?
#include<stdio.h>
main()
{
    float a = 10.2;
    int *p = a;
    printf("%d",*p);
}
Q. The operator used to access the value of variable at address stored in a pointer variable is?

Q. What will be the output of following code assuming that array begins at location 1002?
#include<stdio.h>
main()
{
    int a[5] = {1, 2, 3, 4, 5};
    int *p = a;
    printf("%d\t%d\t%d\t%d\t",*p,0[a],a,p);
}
Q. What will be the output of following code?
#include <stdio.h>
int arr[] = {1,2,3};
main()
{
    int *ptr; 
    ptr = arr;
    ptr = ptr+3;
    printf("%d",*ptr);
}
Q. What will be the output of following code?
#include <stdio.h>
void main()
{
    int const *p = 5;
    printf("%d", ++(*p));
}
Q What will be the output of following code?
#include<stdio.h>
main()
{
    struct std
    {
        int x = 3;
        char name[] = "hello";
    };
    struct std *s;
    printf("%d", s->x);
    printf("%s", s->name);
}

Q. What will be the output of following code?
#include <stdio.h>
main()
{
    register i = 5;
    char j[] = "hello";
    printf("%s %d", j, i);
}
Q. What is the size of char on 32-bit machine?
Q Is the NULL pointer same as an uninitialised pointer?
Q. Which of the statement is correct about the code?
int sum(int, int);
int (*s)(int, int);
s = sum;
Q What will be the output of following code?
#include <stdio.h>
int fun(int *a,int *b)
{
    *a = *a+*b;
    *b = *a-*b;
    *a = *a-*b;
}
main()
{
    int x = 10,y = 20;
    fun(&x,&y);
    printf("x= %d y = %d\n", x, y);
}

SUBMIT TEST