C Objective Questions for Practitioners

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Question: 1

Library function pow() belongs to which header file?

(A) mathio.h
(B) math.h
(C) square.h
(D) stdio.h

Compiler
Level: Practitioner Category of MCQ: function

Question: 2

What is the following is invalid header file in C?

(A) math.h
(B) mathio.h
(C) string.h
(D) ctype.h

Compiler
Level: Practitioner Category of MCQ: function

Question: 3

//What is output of below code?
#include<stdio.h>

int main()
{
char name[]="Cppbuz";
int len;
int size;
len = strlen(name);
size = sizeof(name);
printf("%d,%d",len,size);
return 0;
}

(A) 6,6
(B) 6,7
(C) 7,7
(D) 0,0

Compiler
Level: Practitioner Category of MCQ: function

Question: 4

The concept of two functions with same name is know as function overloading. Is it supported by C language?

(A) Yes
(B) No

Compiler
Level: Practitioner Category of MCQ: function

Question: 5

What is the meaning of below lines?
void sum (int, int);

(A) sum is function which takes int arguments
(B) sum is a function which takes two int arguments and returns void
(C) it will produce compilation error
(D) Can't comment

Compiler
Level: Practitioner Category of MCQ: function

Question: 6

//What is output of below program?
#include<stdio.h>

int main()
{
int i,j,k,count;
count=0;
for(i=0;i<5;i++)
{
   for(j=0;j<5;j++)
   {
      count++;
   }
}
printf("%d",count);
return 0;
}

(A) 5
(B) 10
(C) 25
(D) 50

Compiler
Level: Practitioner Category of MCQ: loops

Question: 7

//What is output of below program?
#include<stdio.h>

int main()
{
  int i;
  for(i=0; i<5; i++);
  {
    printf("cppbuzz");
  }

  return 0;
}

(A) cppbuzz is printed 5 times
(B) Compilation Error
(C) cppbuzz is printed 1 times
(D) Nothing is printed

Compiler
Level: Practitioner Category of MCQ: loops

Question: 8

//What is output of below program?
#include<stdio.h>

int main()
{
int i,j,count;
count=0;
for(i=0; i<5; i++);
{ 
	for(j=0;j<5;j++);
	{
	    count++;
	}
}
printf("%d",count);
return 0;
}

(A) 55
(B) 54
(C) 1
(D) 0

Compiler
Level: Practitioner Category of MCQ: loops

Question: 9

//How many times CppBuzz.com is printed?
#include<stdio.h>

int main()
{
while(1)
{
    printf("CppBuzz.com");
}

return 0;
}

(A) 1 time
(B) Compilation Error
(C) Infinite times
(D) Runtime Error

Compiler
Level: Practitioner Category of MCQ: loops

Question: 10

//How many times CppBuzz.com is printed?
#include<stdio.h>

int main()
{
while(1);
{
    printf("CppBuzz.com");
}

return 0;
}

(A) 1 time
(B) 0 time
(C) Compilation/Runtime Error
(D) Blank Screen in Infinite Loop

Compiler
Level: Practitioner Category of MCQ: loops

Question: 11

//What is printed on console?
#include<stdio.h>

int main()
{
int a = 0;
while(a)
{
    printf("CppBuzz.com");
}

return 0;
}

(A) CppBuzz.com is printed Infinite times
(B) CppBuzz.com is printed 1 time only
(C) Nothing is printed
(D) Program gives error

Compiler
Level: Practitioner Category of MCQ: loops

Question: 12

//How many times CppBuzz.com is printed on console?
#include<stdio.h>

int main()
{
int a = 0;
while(a++)
{
    printf("CppBuzz.com");
}

return 0;
}

(A) Nothing is printed on screen
(B) 0 time
(C) 1 time
(D) Infinite times (Untill Stack overflow)

Compiler
Level: Practitioner Category of MCQ: loops

Question: 13

//How many times CppBuzz.com is printed?
#include<stdio.h>

int main()
{
int a = 0;
while(a++);
{
    printf("CppBuzz.com");
}

return 0;
}

(A) 0 time
(B) 1 time
(C) Compilation Error
(D) Infinite times

Compiler
Level: Practitioner Category of MCQ: loops

Question: 14

//How many times CppBuzz.com is printed?
#include<stdio.h>

int main()
{
int a = 0;
while(a++ < 5)
printf("CppBuzz.com");
return 0;
}

(A) 4 times
(B) 5 times
(C) 0 time
(D) Infinite times

Compiler
Level: Practitioner Category of MCQ: loops

Question: 15

#include<stdio.h>

int main()
{
    int a = 320;
    char *ptr;
    ptr =( char *)&a;
    printf("%d",*ptr);
    return 0;
}

(A) 320
(B) 60
(C) 160
(D) 64

Compiler
Level: Practitioner Category of MCQ: pointers

Question: 16

#include<stdio.h>

int main()
{
    char arr[5]="The CppBuzz.com";
    printf("%s",arr);
    return 0;
}

(A) The CppBuzz.com
(B) The C
(C) The CppBuzz
(D) Compilation Error

Compiler
Level: Practitioner Category of MCQ: datatype

Question: 17

Is it true that a function may have several declaration, but only one definition.

(A) True
(B) False

Compiler
Level: Practitioner Category of MCQ: function

Question: 18

Is it possible to return two values by any function?

(A) Yes
(B) No

Compiler
Level: Practitioner Category of MCQ: function

Question: 19

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[]) {	
	int a = atoi("100");
	printf("%d",a);
	return 0;
}

(A) 0
(B) 1
(C) 100
(D) 3

Compiler
Level: Practitioner Category of MCQ: function

Question: 20

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[]) {	
    char temp[20];
    gcvt(23.45,2, temp);
    printf("%s", temp);
    return 0;
}

(A) .4
(B) 23
(C) 23.45
(D) 23.

Compiler
Level: Practitioner Category of MCQ: function

Question: 21

#include <stdio.h>

char * f();
char a = 'a';

int main(int argc, char *argv[])
{	
char *temp = f();
printf("%s", temp);
return 0;
}

char *f()
{ return &a;
}

(A) a
(B) "a"
(C) nothing
(D) Compilation Error

Compiler
Level: Practitioner Category of MCQ: function

Question: 22

#include <stdio.h>

char * f();
char a = 'a';

int main(int argc, char *argv[])
{	
char *temp = f();
printf("%&", temp);
return 0;
}

char *f()
{ 
return &a;
}

(A) a
(B) %
(C) Compilation Error
(D) Nothing is printed

Compiler
Level: Practitioner Category of MCQ: function

Question: 23

What is the Latest Version of C Language?

(A) C11
(B) C99
(C) C95
(D) C89

Compiler
Level: Practitioner Category of MCQ: other

Question: 24

Is there any limit in adding no of header files in program?

(A) Yes
(B) No

Compiler
Level: Practitioner Category of MCQ: preprocessor

Question: 25

Which of the following ways can be used to include header file in C programs?

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