Interview Questions and Answer on Function in C

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

Library function getch() belongs to which header file?

(A) stdio.h
(B) conio.h
(C) stdlib.h
(D) stdlibio.h

Compiler
Level: Beginner Category of MCQ: function

Question: 3

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: 4

//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: 5

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: 6

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: 7

#include<stdio.h>

int main()
{ 
    int a = printf ("CppBuzz.com");
    printf("%d", a);
    return 0;
}

(A) Compilation Error
(B) 0
(C) CppBuzz.com
(D) CppBuzz.com11

Compiler
Level: Beginner Category of MCQ: function

Question: 8

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: 9

How many main() function we can have in our project?

(A) 1
(B) 2
(C) No Limit
(D) Depends on Compiler

Compiler
Level: Beginner Category of MCQ: function

Question: 10

Is it possible to run program without main() function?

(A) Yes
(B) No

Compiler
Level: Beginner Category of MCQ: function

Question: 11

Is it possible to return two values by any function?

(A) Yes
(B) No

Compiler
Level: Practitioner Category of MCQ: function

Question: 12

#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: 13

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

int main(int argc, char *argv[]) {	
	 char buffer[4];
	 itoa(123, buffer, 10);
	 printf("%s", buffer);
	 return 0;
}

(A) 1234
(B) 12340
(C) 123
(D) 0

Compiler
Level: Expert Category of MCQ: function

Question: 14

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

int main(int argc, char *argv[]) {	
    char temp[20];
    gcvt(23.45, 3, temp);
    printf("%s", temp);
    return 0;
}

(A) 0
(B) 23.5
(C) 23.450000
(D) 23.4

Compiler
Level: Expert Category of MCQ: function

Question: 15

#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: 16

#include <stdio.h>

int main(int argc, char *argv[]) {	

char str1 [] = "CppBuzz";
int a = 10;
char str2[12] ;
sprintf (str2, "%s-%d", str1, a) ;
printf ( "%s", str2 ) ; 

return 0;
}

(A) CppBuzz10
(B) CppBuzz-10
(C) CppBuzz 10
(D) Compilation Error

Compiler
Level: Expert Category of MCQ: function

Question: 17

#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: 18

#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: 19

#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) %a
(C) %%
(D) %

Compiler
Level: Expert Category of MCQ: function

Question: 20

#include <stdio.h>

void decrement();

int main()
{
decrement();
decrement();
decrement();
return 0;
}

void decrement()
{
 static int i = 5;
 printf("%d",i);
 i--;
}

(A) 555
(B) 543
(C) 545
(D) 544

Compiler
Level: Practitioner Category of MCQ: function

Question: 21

#include <stdio.h>

int main()
{
printf("%d",printf("HELLO"));

return 0;

}

(A) Compilation Error
(B) Hello
(C) 5Hello
(D) Hello5

Compiler
Level: Practitioner Category of MCQ: function

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Interview Questions on Functions in C : (21)

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