Qualcomm Pointers Quiz-1

Question 1

Time: 00:00:00

In which header file is the NULL macro defined?

stdio.h

stddef.h

stdio.h and stddef.h

math.h

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Question 2

Time: 00:00:00

Can you combine the following two statements into one?

char *p;
p = (char*) malloc(100);

char p = *malloc(100);

char *p = (char) malloc(100);

char *p = (char*)malloc(100);

char *p = (char *)(malloc*)(100);

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Question 3

Time: 00:00:00

What would be the equivalent pointer expression for referring the array element a[i][j][k][l]

((((a+i)+j)+k)+l)

*(*(*(*(a+i)+j)+k)+l)

(((a+i)+j)+k+l)

((a+i)+j+k+l)

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Question 4

Time: 00:00:00

What will be the output of the program ?

#include

int main()
{
int i=3, *j, k;
j = &i;
printf("%d\n", i**j*i+*j);
return 0;
}

30

27

9

3

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Question 5

Time: 00:00:00

What will be the output of the program ?

#include

int main()
{
int x=30, *y, *z;
y=&x; /* Assume address of x is 500 and integer is 4 byte size */
z=y;
*y++=*z++;
x++;
printf("x=%d, y=%d, z=%d\n", x, y, z);
return 0;
}

x=31, y=502, z=502

x=31, y=500, z=500

x=31, y=498, z=498

x=31, y=504, z=504

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Question 6

Time: 00:00:00

What will be the output of the program?

#include

int main()
{
int arr[3] = {2, 3, 4};
char *p;
p = arr;
p = (char*)((int*)(p));
printf("%d, ", *p);
p = (int*)(p+1);
printf("%d", *p);
return 0;
}

2, 3

2, 0

2, Garbage value

0, 0

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Question 7

Time: 00:00:00

What will be the output of the program assuming that the array begins at location 1002?

#include

int main()
{
int a[2][3][4] = { {1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 1, 2},
{2, 1, 4, 7, 6, 7, 8, 9, 0, 0, 0, 0} };
printf("%u, %u, %u, %d\n", a, *a, **a, ***a);
return 0;
}

1002, 2004, 4008, 2

2004, 4008, 8016, 1

1002, 1002, 1002, 1

Error

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Question 8

Time: 00:00:00

What will be the output of the program ?

#include
power(int**);
int main()
{
int a=5, *aa; /* Address of 'a' is 1000 */
aa = &a;
a = power(&aa);
printf("%d\n", a);
return 0;
}
power(int **ptr)
{
int b;
b = **ptr***ptr;
return (b);
}

5

25

125

Garbage value

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Question 9

Time: 00:00:00

What will be the output of the program ?

#include
#include

int main()
{
int i, n;
char *x="Alice";
n = strlen(x);
*x = x[n];
for(i=0; i<=n; i++)
{
printf("%s ", x);
x++;
}
printf("\n", x);
return 0;
}

Alice

ecilA

Alice lice ice ce e

lice ice ce e

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