C Objective Questions for Experts

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Question: 1

Can we declare function inside structure of C Programming?

(A) Yes
(B) No
(C) Depends on Compiler
(D) Yes but run time error

Compiler
Level: Expert Category: structure

Question: 2

What is the storage class for variable A in below code?

int main()
{
int A;
A = 10;
printf("%d", A);
return 0;
}

(A) extern
(B) auto
(C) register
(D) static

Compiler
Level: Expert Category: storgeclass

Question: 3

What is the output of the below program?

int main()
{
for(; ;)
for(; ;)
    printf("Hello..");

return 0;
}

(A) Compilation Error
(B) Runtime Error
(C) Hello is printed one time
(D) Hello is printed infinite times

Compiler
Level: Expert Category: loops

Question: 4

What is output of below program?

int main()
{
 for(; ;);
 for(; ;);
    printf("Hello");
return 0;
}

(A) Compilation Error
(B) Runtime Error
(C) Nothing is printed
(D) Hello is printed infinite times

Compiler
Level: Expert Category: loops

Question: 5

What is the output of the below program?
int main()
{
 int i;

 for(i = 0,i<5,i++)
 {
   printf("Hello");
 }

 return 0;
}

(A) Hello is printed 5 times
(B) Compilation Error
(C) Runtime Error
(D) Hello is printed 4 times

Compiler
Level: Expert Category: loops

Question: 6

What is output of the below program?

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

(A) Hello is printed 5 times
(B) Compilation Error
(C) Hello is printed 2 times
(D) Hello is printed 3 times

Compiler
Level: Expert Category: loops

Question: 7

What is output of the below program?
int main()
{
 int i,j;
 for(i = 0,j=0;i<5;i++)
 {
   printf("%d%d--",i,j);
 }
 return 0;
}

(A) 0--01--12--23--34--
(B) 00--10--20--30--40--
(C) Compilation Error
(D) 00--01--02--03--04--

Compiler
Level: Expert Category: loops

Question: 8

How many times CppBuzz.com is printed on console?
int main()
{
int a = 0;
while(a==0)
{
    printf("CppBuzz.com");
}

return 0;
}

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

Compiler
Level: Expert Category: loops

Question: 9

How many times CppBuzz.com is printed?
int main()
{
int a = 0;
while(a++ < 5-++a)
printf("CppBuzz.com");
return 0;
}

(A) 5 times
(B) 4 times
(C) 2 times
(D) 1 time

Compiler
Level: Expert Category: loops

Question: 10

int main()
{
    int x;
    x=10,20,30;
    printf("%d",x);
    return 0;
}

(A) 10
(B) 20
(C) 30
(D) Compilation Error

Compiler
Level: Expert Category: operators

Question: 11

int main()
{
    int a = 5;
    int b = 10;
    int c = a+b;
    printf("%i",c);
}

(A) 0
(B) 15
(C) Undefined i
(D) Any other Compiler Error

Compiler
Level: EXpert Category: datatype

Question: 12

int main()
{
	int _ = 10;
	int __ = 20;
	int ___ = _ + __;
	printf("__%d",___);
	return 0;
}

(A) Compilation Error
(B) Runtime Error
(C) __0
(D) __30

Compiler
Level: Expert Category: datatype

Question: 13

int x = 10;

int main()
{
    int x = 0;
    printf("%d",x);
    return 0;
}

(A) 10
(B) 0
(C) Compilation Error
(D) Undefined

Compiler
Level: Expert Category: datatype

Question: 14

What is sizeof() in C?

(A) Operator
(B) Function
(C) Macro
(D) None of these

Compiler
Level: Expert Category: operators

Question: 15

Is it possible to write C program which it print self?

(A) Yes
(B) No

Compiler
Level: Expert Category: filehandling

Question: 16

How many times cppbuzz.com is printed?

int main()
{

if(printf("cppbuzz.com"))
printf("cppbuzz.com");

return 0;
}

(A) 1
(B) 2
(C) 0
(D) Compilation Error

Compiler
Level: Expert Category: conditional

Question: 17

#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: function

Question: 18

#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: function

Question: 19

#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: function

Question: 20

#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: function

Question: 21

Which compilation unit is responsible for adding header files content in the source code?

(A) Linker
(B) Compiler
(C) Assembler
(D) Preprocessor

Compiler
Level: Expert Category: preprocessor

Question: 22

What is the extension of output file produced by Preprocessor?

(A) .h
(B) .exe
(C) .i
(D) .asm

Compiler
Level: Expert Category: preprocessor

Question: 23

__FILE__ is predefined macro and contains the current filename as a string. Is this true/false?

(A) Yes
(B) No

Compiler
Level: Expert Category: preprocessor

Question: 24

Which of the following ways are correct to include header file in C program?

(A) #include<stdio.h>
(B) #include"stdio.h"
(C) Both A & B

Compiler
Level: Expert Category: datatype

Question: 25

Which one of the following is invalid macro in C programming?

(A) #pragma
(B) #error
(C) #ifndef
(D) #elseif

Compiler
Level: Expert Category: macros

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