Questions and answers for exam Preparation

MCQs

Total Questions : 64 | Page 3 of 7 pages

What will be the output of the program ?

#include<stdio.h>
power(int**);
int main()
{
int a=5, *aa; /* Address of 'a' is 1000 */
aa = &a;
a = power(&aa);
printf("%dn", a);
return 0;
}
power(int **ptr)
{
int b;
b = **ptr***ptr;
return (b);
}

5
25
125
Garbage value

Discuss Question

Answer: Option B. -> 25

No answer description available for this question.

Question 22.

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

#include<stdio.h>
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

Discuss Question

Answer: Option C. -> 1002, 1002, 1002, 1

No answer description available for this question.

Question 23.

What will be the output of the program ?

#include<stdio.h>
int main()
{
char *str;
str = "%d\n";
str++;
str++;
printf(str-2, 300);
return 0;
}

No output
30
3
300

Discuss Question

Answer: Option D. -> 300

No answer description available for this question.

Question 24.

What will be the output of the program ?

#include<stdio.h>
int main()
{
char *p;
p="hello";
printf("%s\n", *&*&p);
return 0;
}

llo
hello
ello
h

Discuss Question

Answer: Option B. -> hello

No answer description available for this question.

Question 25.

What will be the output of the program ?

#include<stdio.h>
int main()
{
char str[] = "peace";
char *s = str;
printf("%s\n", s++ +3);
return 0;
}

peace
eace
ace
ce

Discuss Question

Answer: Option D. -> ce

No answer description available for this question.

Question 26.

What will be the output of the program?

#include<stdio.h>
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

Discuss Question

Answer: Option B. -> 2, 0

No answer description available for this question.

Question 27.

What will be the output of the program if the size of pointer is 4-bytes?

#include<stdio.h>
int main()
{
printf("%d, %d\n", sizeof(NULL), sizeof(""));
return 0;
}

2, 1
2, 2
4, 1
4, 2

Discuss Question

Answer: Option C. -> 4, 1

In TurboC, the output will be 2, 1 because the size of the pointer is 2 bytes in 16-bit platform.
But in Linux, the output will be 4, 1 because the size of the pointer is 4 bytes.
This difference is due to the platform dependency of C compiler.

Question 28.

What will be the output of the program?

#include<stdio.h>
int main()
{
int arr[2][2][2] = {10, 2, 3, 4, 5, 6, 7, 8};
int *p, *q;
p = &arr[1][1][1];
q = (int*) arr;
printf("%d, %d\n", *p, *q);
return 0;
}

8, 10
10, 2
8, 1
Garbage values

Discuss Question

Answer: Option A. -> 8, 10

No answer description available for this question.

Question 29.

What will be the output of the program ?

#include<stdio.h>
int main()
{
void *vp;
char ch=74, *cp="JACK";
int j=65;
vp=&ch;
printf("%c", *(char*)vp);
vp=&j;
printf("%c", *(int*)vp);
vp=cp;
printf("%s", (char*)vp+2);
return 0;
}

JCK
J65K
JAK
JACK

Discuss Question

Answer: Option D. -> JACK

No answer description available for this question.

Question 30.

What will be the output of the program assuming that the array begins at
the location 1002 and size of an integer is 4 bytes?

#include<stdio.h>
int main()
{
int a[3][4] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };
printf("%u, %u, %u\n", a[0]+1, *(a[0]+1), *(*(a+0)+1));
return 0;
}