Questions and answers for exam Preparation

MCQs

Total Questions : 64 | Page 2 of 7 pages

In the following program add a statement in the function fun() such that address
of a gets stored in j?

#include<stdio.h>
int main()
{
int *j;
void fun(int**);
fun(&j);
return 0;
}
void fun(int **k)
{
int a=10;
/* Add a statement here */
}

**k=a;
k=&a;
*k=&a
&k=*a

Discuss Question

Answer: Option C. -> *k=&a

No answer description available for this question.

Question 12.

Which of the statements is correct about the program?

#include<stdio.h>
int main()
{
float a=3.14;
char *j;
j = (char*)&a;
printf("%d\n", *j);
return 0;
}

It prints ASCII value of the binary number present in the first byte of a float variable a.
It prints character equivalent of the binary number present in the first byte of a float variable a.
It will print 3
It will print a garbage value

Discuss Question

Answer: Option A. -> It prints ASCII value of the binary number present in the first byte of a float variable a.

No answer description available for this question.

Question 13.

Which of the following statements correct about k used in the below statement?
char ****k;

k is a pointer to a pointer to a pointer to a char
k is a pointer to a pointer to a pointer to a pointer to a char
k is a pointer to a char pointer
k is a pointer to a pointer to a char

Discuss Question

Answer: Option B. -> k is a pointer to a pointer to a pointer to a pointer to a char

Question 14.

Which of the following statements correctly declare a function that receives a pointer to

pointer to a pointer to a float and returns a pointer to a pointer to a pointer to a pointer to

a float?

float **fun(float***);
float *fun(float**);
float fun(float***);
float ****fun(float***);

Discuss Question

Answer: Option D. -> float ****fun(float***);

No answer description available for this question.

Question 15.

Which of the statements is correct about the program?

#include<stdio.h>
int main()
{
int i=10;
int *j=&i;
return 0;
}

j and i are pointers to an int
i is a pointer to an int and stores address of j
j is a pointer to an int and stores address of i
j is a pointer to a pointer to an int and stores address of i

Discuss Question

Answer: Option C. -> j is a pointer to an int and stores address of i

No answer description available for this question.

Question 16.

Point out the error in the program

#include<stdio.h>
int main()
{
int a[] = {10, 20, 30, 40, 50};
int j;
for(j=0; j

Error: Declaration syntax
Error: Expression syntax
Error: LValue required
Error: Rvalue required

Discuss Question

Answer: Option C. -> Error: LValue required

Question 17.

Point out the compile time error in the program given below.

#include<stdio.h>
int main()
{
int *x;
*x=100;
return 0;
}

Error: invalid assignment for x
Error: suspicious pointer conversion
No error
None of above

Discuss Question

Answer: Option C. -> No error

While reading the code there is no error, but upon running the program having an unitialised

variable can cause the program to crash (Null pointer assignment).

Question 18.

What will be the output of the program ?

#include<stdio.h>
int main()
{
int i, a[] = {2, 4, 6, 8, 10};
change(a, 5);
for(i=0; i

7, 9, 11, 13, 15
2, 15, 6, 8, 10
2 4 6 8 10
3, 1, -1, -3, -5

Discuss Question

Answer: Option B. -> 2, 15, 6, 8, 10

No answer description available for this question.

Question 19.

If the size of integer is 4bytes, What will be the output of the program?

#include<stdio.h>#define CUBE(x) (x*x*x)
int main()
{
int arr[] = {12, 13, 14, 15, 16};
printf("%d, %d, %d\n", sizeof(arr), sizeof(*arr), sizeof(arr[0]));
return 0;
}