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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