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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