C operator questions with answers

C programming tricky objective type operators questions and answers with explanation for written test and interview

(1)

What will be output of the following program?

#include<stdio.h>

int main(){

    float a=0.7;d 

    if(a<0.7){

         printf("C");

    }

    else{

         printf("C++");

    }
    return 0;

}

EXPLANATION

---

(2)

What will be output of the following program?

        

#include<stdio.h>

int main(){

    int i=5,j;

    j=++i+++i+++i;

    printf("%d %d",i,j);

    return 0;

}

EXPLANATION

---

(3)

What will be output of the following program?

#include<stdio.h>

int main(){

    int i=1;

    i=2+2*i++;

    printf("%d",i);

    return 0;

}

EXPLANATION

---

(4)

What will be output of the following program?

#include<stdio.h>

int main(){

    int a=2,b=7,c=10;

    c=a==b;

    printf("%d",c);

    return 0;

}

EXPLANATION

---

(5)

What will be output of the following program?

#include<stdio.h>

void main(){

    int x;

    x=10,20,30;

    printf("%d",x);

    return 0;

}

EXPLANATION

---

(6)

What will be output of the following program?

#include<stdio.h>

int main(){

    int a=0,b=10;

    if(a=0){

         printf("true");

    }

    else{

         printf("false");

    }

    return 0;

}

EXPLANATION

---

(7)

What will be output of the following program?

#include<stdio.h>

int main(){

    int a;

    a=015 + 0x71 +5;

    printf("%d",a);

    return 0;

}

EXPLANATION

---

(8)

What will be output of the following program?

#include<stdio.h>

int main(){

    printf("%d %d %d",sizeof(3.14),sizeof(3.14f),sizeof(3.14L));

    return 0;

}

EXPLANATION

---

(9)

What will be output of the following program?

#include<stdio.h>

int main(){

    int x=100,y=20,z=5;

    printf("%d %d %d");

    return 0;

}

EXPLANATION

---

(10)

What will be output of the following program?

#include<stdio.h>        

int main(){

    int a=2;

    a=a++ + ~++a;

    printf("%d",a);

    return 0;

}

EXPLANATION

---

(11)

What will be output of the following program?

#include<stdio.h>

int main(){

    int a;

    a=sizeof(!5.6);

    printf("%d",a);

    return 0;

}

EXPLANATION

---

(12)

What will be output of the following program?

#include<stdio.h>

int main(){

    float a;

    (int)a= 45;

    printf("%d,a);

    return 0;

}

EXPLANATION

---

(13)

What will be output of the following program?

#include<stdio.h>

int main(){

     int i=5;

     int a=++i + ++i + ++i;

     printf("%d",a);

     return 0;

}