C Aptitude Questions And Answers - ARRAY

---------------------------------- Test Your "C" Skill -------------------------------------

ARRAY  

1.void main()

{

 char arr[]=”Visual C++”

 char *arr= “Visual C++”

 printf(“\n %d %d”, sizeof(a), sizeof(b));

 printf(“\n %d %d”, sizeof(*a), sizeof(*b));

}

Output:- 11 2

                 1  1

2.   For the following statements would arr[3] and ptr[3] fetch the same character?

char arr[]=”ItChallengers”

char *ptr=”ItChallengers”

Ans:YES.

3. void main()

    {

        int a[3] = {10, 20, 30};

        int *p = a;

        printf("%p\t%p", p, a);

    }

a) Same address is printed.

b) Different address is printed.

c) Compile time error

d) Nothing

Output:- A

4.What does the following declaration mean?

int (*ptr)[10];

A. ptr is array of pointers to 10 integers

B. ptr is a pointer to an array of 10 integers

C. ptr is an array of 10 integers

D. ptr is an pointer to array

Output:- B

5.

int main()

{

    int a[5] = {5, 1, 15, 20, 25};

    int i, j, m;

    i = ++a[1];

    j = a[1]++;

    m = a[i++];

    printf("%d, %d, %d", i, j, m);

    return 0;

}

A. 2, 1, 15

B. 1, 2, 5

C. 3, 2, 15

D. 2, 3, 20

Output:- C

6.

void main()

{

   int a[3][4] = {

                         1, 2, 3, 4,

                         4, 3, 2, 8,

                 7, 8, 9, 0

                         };

   int *ptr;

   ptr = &a[0][0];

   fun (&ptr);

}

fun (int **p)

{

  printf(“\n%d”,**p);

}

Output:-   1

7.What would be the o/p of the following program if the array begins at 65442?

void main()

{

 int a[3][4] = {

                         1, 2, 3, 4,

                         4, 3, 2, 1,

                         7, 8, 9, 0

                    };

 printf(“\n %u  %u”, a+1, %a+1);

}

Output:-    65450  65466

8.

void main()

{

  float arr[]= { 12.4, 2.3, 4.5, 6.7};

  printf(“\n %d”, sizeof(arr)/sizeof(arr[0]));

}

Output:-   4

9.   Would the following program compile successfully?

void main()

{

 char a[]= “Hello”;

 char *p= “ItChallengers”;

 a=”ItChallengers”;

 p=”Hello”;

 printf(“\n %s  %s”, a, p);

}

Output:-  NO. Because we may assign a new string to a pointer but not to an array.

10.     What be the output of the following program if the array begins at 65486?

void main()

{

 int arr[]= {12, 14, 15, 23, 45}

 printf(“%u  %u”, arr+1, &arr+1);

} 

      Output: 65488  65496

11.  What would be the o/p of the following program, if the array begins at address 1200?

void main()

{

 int  arr[]={2, 3, 4, 1, 6};

 printf(“%d  %d”, arr, sizeof(arr));

} 

    Output:  1200  10

12.   What would be the O/p of the following program, if the array begind at address 65486?

void main()

{

 int arr[]={12, 14, 15, 23, 45};

 printf(“%u  %u”,arr, &arr);

} 

        Output: 65486  65486