C online practice test

C free online practice test questions and answers

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

1.

What will be output of following c program?

#include<stdio.h>

#define max

int main(){

    printf("%d",max);

    return 0;

}

(A)	0
(B)	null
(C)	Garbage
(D)	-1
(E)	Compilation error

2.

What will be output of following c program?

#include<stdio.h>

int main(){

    for(printf("1");!printf("0");printf("2"))

         printf("Sachin");

    return 0;

}

(A)	10sachin2
(B)	10sachin
(C)	10sachin210sachin2
(D)	10
(E)	Compilation error

3.

What will be output of following c program?

#include<stdio.h>

int main(){

    int a=5;

    static int b=a;

    printf("%d %d",a,b);

    return 0;

}

(A)	5   5
(B)	5   0
(C)	5   null
(D)	5   Garbage
(E)	Compilation error

4.

What will be output of following c program?

#include<stdio.h>

void main(){

    int i;

    for(i=0;i<5;i++){

         int x=0;

         printf("%d",x);

         x++;

    }  

}

(A)	01234
(B)	001234
(C)	0000
(D)	Infinite loop
(E)	Compilation error

5.

What will be output of following c program?

#include<stdio.h>

#include<conio.h>

void main(){

    int a[]={5,10,15};

    int i=0,num;

    num=a[++i]+ ++i+(++i);

    printf("%d",num);

}

(A)	6
(B)	17
(C)	16
(D)	12
(E)	Compilation error

6.

What will be output of following c program?

#include<stdio.h>

#include<conio.h>

void main(){

    int i=3,val;

    val=f(i)+ +f(i=1)+ +f(i-1);

    printf("%d",val);

}

int f(int num){

    return num*5;

}

(A)	30
(B)	20
(C)	21
(D)	31
(E)	Compilation error

7.

What will be output of following c program?

#include<stdio.h>

#include<conio.h>

long fu(int);

char vect[]={1,2,3,4,5};

void main(){

    int i=1;

    i=fu(++i)+ ++vect[++i]+ ++i+fu(i++);

    printf("%d",i);

}

long fu(int x){

    return x*3;

}

(A)	31
(B)	32
(C)	33
(D)	34
(E)	Compilation error

8.

What will be output of following c program?

#include<stdio.h>

#include<conio.h>

void main(){

    int a,i=4;

    a=- -i+- -i+- -5;

    printf("%d %d",a,i);

}

(A)	13  4
(B)	-3  2
(C)	7   2
(D)	-13 4
(E)	Compilation error

9.

What will be output of following c program?

#include<stdio.h>

#include<conio.h>

void main(){

    int num,a=5;

    num=---a;

    printf("%d  %d",num,a);

}

(A)	-4  4
(B)	3   3
(C)	-4  5
(D)	-5 -5
(E)	Compilation error

10.

What will be output of following c program?

#include<stdio.h>

#include<conio.h>

void main(){

    int num,a=10;

    num=a--- -a--;

    printf("%d  %d",num,a);

}

(A)	0 8
(B)	0 10
(C)	20 8
(D)	-1 10
(E)	Compilation error

11.

What will be output of following c program?

#include<stdio.h>

#include<conio.h>

void main(){

    int z;

    z=(5,3,2);

    printf("%d",z);

}

(A)	5
(B)	3
(C)	2
(D)	10
(E)	Compilation error

12.

What will be output of following c program?

#include<stdio.h>

#include<conio.h>

void main(){

    int i=5,j=10,num;

    num=(++i,++j,i+j);

    printf("%d  %d  %d",num,i,j); 

}

(A)	17  6  11
(B)	6   6  11
(C)	15  6  11
(D)	15  5  10
(E)	Compilation error

13.

What will be output of following c program?

#include<stdio.h>

#include<conio.h>

float avg(float,float,float);

void main(){

    float p=1,q=2,r=-2,a;

    a=avg(p,(q=4,r=-12,q),r);

    printf("%f",a); 

}

float avg(float x,float y,float z){

    return (x+y+z)/3;

}

(A)	0.111111
(B)	1.000000
(C)	-0.777777
(D)	-1.000000
(E)	Compilation error

14.

What will be output of following c program?

#include<stdio.h>

int main(){

    float **(*ptr)[4]=(float **(*)[4])0;

    ptr+=5;

    printf("%d  %d",ptr,sizeof ptr);

    return 0;

}

(A)	0  2
(B)	5  2
(C)	4  2
(D)	40 2
(E)	Compilation error

15.

What will be output of following c program?

#include<stdio.h>

struct myStruct{

    int a;

    char b;

}*ptr;

int main(){

    struct myStruct ms={400,'A'};

    printf("%d  %d",ptr->a,ptr->b);

    return 0;

}

(A)	400 A
(B)	400 65
(C)	400 97
(D)	0  0
(E)	Compilation error

16.

What will be output of following c program?

#include<stdio.h>

int main(){

    float x;

    x=(int)5.6f*3.2f/sizeof((int)6.6);

    printf("%f",x);

    return 0;

}

(A)	8.960000
(B)	9.600000
(C)	8.000000
(D)	2.000000
(E)	Compilation error

17.

What will be output of following c program?

#include<stdio.h>

#define plus +

#define minus +plus

int main(){

    long x,i=3;

    x=+ + i;

    printf("%ld",x);

    return 0;

}

(A)	4
(B)	3
(C)	0
(D)	6
(E)	Compilation error

18.

What will be output of following c program?

#include<stdio.h>

int main(){

    float x;

    x=(int)1.1,(float)2.2,(int)3.3 ,5.4;

    printf("%f",x);

    return 0;

}

(A)	1.000000
(B)	5.400000
(C)	2.200000
(D)	3.300000
(E)	Compilation error

19.

What will be output of following c program?

#include<stdio.h>

#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;

    STU2 *p2;

    p1=&s1;

    memcpy(p2,p1,4);

    printf("Roll  : %d\n",p2->roll);

    printf("Name  : %s\n",p2->name);

    printf("Marks : %lf",p2->marks);  

}

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

20.

What will be output of following c program?

#include "string.h"

typedef struct stu1{

    char name1[6];

    char name2[6];

    double marks;

}STU1;

void main(){

    STU1 s1={"rohit","kumar",87.43},*p1;

    char *p;

    p1=&s1;

    p=memchr(p1,'u',sizeof(STU1));

    printf("%s",p); 

}

(A)	r
(B)	rohit
(C)	umar
(D)	rohit kumar
(E)	Compilation error

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