C online exam

C free online objective type exam for written test

Total marks :	60
For each correct answer :	+3
For each incorrect answer:	-1
Total time:	60 minutes

1.

What will be output if you will execute following c code?

#include<stdio.h>

int main(){

    int a=0;

    #if (a==0)

         printf("Equal");

    #else if

         printf("Not equal");

    #endif

    return 0;

}

(A)	Equal
(B)	Not equal
(C)	null
(D)	Garbage
(E)	Compilation error

2.

What will be output if you will execute following c code?

#include<stdio.h>

int main(){

    for(;NULL;)

         printf("cquestionbank");

    return 0;

}

(A)	c
(B)	bank
(C)	cquestionbank
(D)	Infinite loop
(E)	Compilation error

3.

What will be output if you will execute following c code?

#include<stdio.h>

auto int a=5;

int main(){

    int x;

    x=~a+a&a+a<<a;

    printf("%d",x);

    return 0;

}

(A)	0
(B)	1
(C)	154
(D)	155
(E)	Compilation error

4.

What will be output if you will execute following c code?

#include<stdio.h>

void main(){

    int a=5;

    {

         int b=10;

         ++b;

         ++a;

         {

             int a=20;

             ++a;

             a=++b;

         }

         ++a;

         ++b;

         printf("%d %d",a,b);

    }

    printf(" %d",a);

}

(A)	7 13 7
(B)	13 13 13
(C)	13 13 5
(D)	6  13 5
(E)	Compilation error

5.

What will be output if you will execute following c code?

#include<stdio.h>

#include<conio.h>

void main(){

    int a[]={0,1,2,3,4,5,6,7,8,9,10};

    int i=0,num;

    num=a[++i+a[++i]]+a[++i];

    printf("%d",num);

}

(A)	6
(B)	7
(C)	8
(D)	9
(E)	Compilation error

6.

What will be output if you will execute following c code?

#include<stdio.h>

#include<conio.h>

void main(){

    int i=3,val;

    val=sizeof f(i)+ +f(i=1)+ +f(i-1);

    printf("%d %d",val,i);

}

int f(int num){

    return num*5;

}

(A)	2 0
(B)	7 1
(C)	17 0
(D)	2 1
(E)	Compilation error

7.

What will be output if you will execute following c code?

#include<stdio.h>

#include<conio.h>

void main(){

    int i;

    (i=8)+=1;

    printf("%d",i);

}

(A)	9
(B)	10
(C)	32
(D)	34
(E)	Compilation error

8.

What will be output if you will execute following c code?

#include<stdio.h>

#include<conio.h>

void main(){

    char c=-'a';

    printf("%d",c);

}

(A)	65
(B)	-65
(C)	-a
(D)	-97
(E)	Compilation error

9.

What will be output if you will execute following c code?

#include<stdio.h>

#include<conio.h>

void main(){

    int num,a=5;

    num=-a--;

    printf("%d  %d",num,a);

}

(A)	5  4
(B)	-4 4
(C)	-5 4
(D)	-4 5
(E)	Compilation error

10.

What will be output if you will execute following c code?

#include<stdio.h>

#include<conio.h>

void main(){

    int num,a=10;

    num=a&&0+ +-1&&a;

    printf("%d  %d",num,a);

}

(A)	1 1
(B)	0 0
(C)	1 10
(D)	0 10
(E)	Compilation error

11.

What will be output if you will execute following c code?

#include<stdio.h>

#include<conio.h>

void main(){

    int x,y,z;

    y=(x=1,y=2,z=3);

    printf("%d  %d  %d",x,y,z);

}

(A)	1 2 3
(B)	1 1 3
(C)	1 3 3
(D)	1 0 3
(E)	Compilation error

12.

What will be output if you will execute following c code?

#include<stdio.h>

#include<conio.h>

void main(){

    int t,a=5,b=10,c=15;

    t=(++a&&++b,++a),++a||++c;

    printf("%d  %d  %d %d",t,a,b,c);

}

(A)	7 8 11 15
(B)	6 7 10 14
(C)	1 8 10 15
(D)	6 18 11 15
(E)	Compilation error

13.

What will be output if you will execute following c code?

#include<stdio.h>

#include<conio.h>

int a=5;

void main(){

    int x;

    x=!a+change();

    printf("%d",x);

}

int change(){

    a=0;

    return 0;

}

(A)	0
(B)	5.000000
(C)	0.000000
(D)	1.000000
(E)	Compilation error

14.

What will be output if you will execute following c code?

#include<stdio.h>

typedef struct cquestionbank{

    int num;

    struct cquestionbank **p;

    struct cquestionbank ***q;

}cqb;

int main(){

    static cqb *var1,**var2;

    cqb temp={5,&var1,&var2};

    var2=&var1;

    var1->num=25;

    printf("%d  %d ",**(temp.q),***(temp.q));

    return 0;

}

(A)	0 5
(B)	0 25
(C)	5 25
(D)	25 5
(E)	Compilation error

15.

What will be output if you will execute following c code?

#include<stdio.h>

union cqbu{

    int a;

    char b;

};

struct cqbs{

    int a;

    char b;

};

int main(){

    union cqbu u={25};

    struct cqbs *ps=(struct cqbs *)&u;

    union  cqbu *pu=(union  cqbu *)&u;

    printf("%d  %d\n",ps->a,ps->b);

    printf("%d  %d\n",pu->a,pu->b);

    return 0;

}

(A)	25 0 25 25
(B)	25 25 25 0
(C)	0 0 25 25
(D)	25 25 25 25
(E)	Compilation error

16.

What will be output if you will execute following c code?

int main(){

    float x;

    x=(float)3.5==3.5;

    printf("%f",x);

    return 0;

}

(A)	0
(B)	0.000000
(C)	1.000000
(D)	3.000000
(E)	Compilation error

17.

What will be output if you will execute following c code?

int main(){

    float x;

    x=(int)(int)2.5+5.8f;

    printf("%f",x);

    return 0;

}

(A)	7.000000
(B)	7.800000
(C)	8.000000
(D)	8.100000
(E)	Compilation error

18.

What will be output if you will execute following c code?

int main(){

    float x;

    x=(float)3.3==3.3;

    printf("%f",x);

    return 0;

}

(A)	0.000000
(B)	1.000000
(C)	3.000000
(D)	3.300000
(E)	Compilation error

19.

What will be output if you will execute following c code?

#include "string.h"

typedef struct stu1{

    int roll;

    char *name;

    double marks;

}STU1;

typedef struct stu2{

    int roll;

    char *name;

    double marks;

}STU2;

void main(){

    STU1 s1={25,"Rohit",87.43},*p1;

    static STU2 *p2;

    p1=&s1;

    memccpy(p2,p1,'\0',sizeof(STU1));

    printf("Roll  : %d\n",p2->roll);

    printf("Name  : %s\n",p2->name);

    printf("Marks : %lf",p2->marks);

}

(A)	Roll  : 25 Name  : (null) Marks : 0.000000
(B)	Roll  : 25 Name  : rohit Marks : 0.000000
(C)	Roll  : 25 Name  : rohit Marks : 87.430000
(D)	Roll  : 0 Name  : (null) Marks : 0.000000
(E)	Compilation error

20.

What will be output if you will execute following c code?

#include<stdio.h>

#define value 30

int main(){

    #if max

         printf("Defined");

    #else

         printf("Not defined");

    #endif

    return 0;

}

(A)	Defined
(B)	Not defined
(C)	null
(D)	Run time error
(E)	Compilation error

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