C operators Q & A
Ques 1. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
int main()
{
int m,n,p;
m=(1,2,3);
p =1,2,3;
printf("i = %d\n",m+p);
return 0;
}
options:
A. 4
B. 2
C. 6
D. compile time error
Ques 2. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
int main()
{
int x=2,y=2,z=1,k=4, h=3;
z+=x==y=k==h;
printf("Hello world! %d\n",z);
return 0;
}
options:
A. 2
B. compiler error lvalue required
C. 3
D. 4
Ques 3. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
int main()
{
int x=2,y=2,z=1,k=4, h=3;
z+=x==(y=k==h);
printf("%d\n",z);
return 0;
}
options:
A. 2
B. 0
C. 1
D. compiler error
Ques 4. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
int main()
{
int xyz=2,3,4;
xyz+=5;
printf("%d\n",xyz);
return 0;
}
options:
A. 9
B. 8
C. 7
D. compiler error
Ques 5. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
int main()
{
int xyz=(2,3,4);
xyz+=5;
printf("%d\n",xyz);
return 0;
}
options:
A. 7
B. 9
C. 8
D. compiler error
Ques 6. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
int main()
{
int mn=5;
++mn++;
printf("%d\n",mn);
return 0;
}
options:
A. 6
B. compiler error
C. 7
D. 8
Ques 7. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
int main()
{
int xyz;
xyz=2,3,4;
xyz+=5;
printf("%d\n",xyz);
return 0;
}
options:
A. 9
B. 8
C. 7
D. compiler error
Ques 8. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
int main()
{
int mn=5;
++mn;
printf("%d\n",mn++);
return 0;
}
options:
A. 8
B. 7
C. 6
D. compiler error
Ques 9. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
int main()
{
int mn=5,y,z,s;
mn = (y=mn++) + (z=mn++) + (s=++mn);
printf("%d\n",mn++);
return 0;
}
options:
A. 19
B. 21
C. 22
D. compiler error
Ques 10. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
int main()
{
int mn=5;
mn = mn++ + mn-- + --mn;
printf("%d\n",mn++);
return 0;
}
options:
A. 16
B. 14
C. 15
D. compiler error
Ques 11. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
int main()
{
int mn=5, y=3;
printf("%d\n",mn>y? 22:44);
return 0;
}
options:
A. 44
B. 22
C. 5
D. 3
Ques 12. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
int fun(int *m, int *n)
{
int sub = *m-*n;
*m=*n;
return *m+*n;
}
int main()
{
int *a,*b;
int x=22,y=3;
a=&x; b=&y;
printf("%d\n",fun(a,b));
return 0;
}
options:
A. 6
B. compiler error
C. 22
D. 8
Ques 13. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
int fun(int *m, int *n)
{
int sub = *m-*n;
*m=*n;
return *m+*n;
}
int main()
{
int *a,*b;
a=(int *)malloc(4);
b=a;
*a=3; *b=5;
printf("%d\n",fun(a,b));
return 0;
}
options:
A. 8
B. 10
C. 13
D. compiler error
Ques 14. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
void fun(int **m, int **n)
{
int t = *m;
*m=*n;
*n=t;
}
int main()
{
int *a,*b;
a=(int *)malloc(4);
b=a;
*a=3; *b=5;
fun(&a,&b);
printf("%d %d\n",*a, *b);
return 0;
}
options:
A. 3 5
B. 5 3
C. 5 5
D. compiler error
Ques 15. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
void fun(int **m, int **n)
{
int t = *m;
*m=*n;
*n=t;
}
int main()
{
int *a,*b;
a=(int *)malloc(sizeof(int)*2);
b=a;
*a=3; *b=5;
*a = *b && fun(&a,&b);
printf("%d %d\n",*a, *b);
return 0;
}
options:
A. compiler error
B. 1 5
C. 5 5
D. 5 1
Ques 16. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
int fun(int **m, int **n)
{
int t = *m;
*m=*n;
*n=t;
return *m=*n;
}
int main()
{
int *a,*b;
a=(int *)malloc(sizeof(int)*2);
b=a;
*a=3; *b=5;
*a = *b && fun(&a,&b);
printf("%d %d\n",*a, *b);
return 0;
}
options:
A. compiler error
B. 1 1
C. 5 5
D. 3 3
Ques 17. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
int main()
{
int a,b;
a=3; b=5;
b = sizeof( a *= b+5);
printf("%d %d\n",a, b);
return 0;
}
options:
A. 3 5
B. 3 20
C. 3 4
D. compiler error
Ques 18. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
int main()
{
int a,b,c, d;
a = 5; b=4; d=7;
c=a & b | d;
printf("%d \n", c);
return 0;
}
options:
A. 7
B. 5
C. 4
D. compiler error
Ques 19. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
int main()
{
int a,b,c, d, e=6;
a = 5; b=4; d=7;
c=a & b | d ^ e;
printf("%d \n", c);
return 0;
}
options:
A. 4
B. 7
C. 5
D. compiler error
Ques 20. what is the output for the below code?
#include <stdio.h>
#include <stdlib.h>
int main()
{
int a,b,c, d, e=2;
a = 5; b=4; d=7;
c=a >> b | d << e;
printf("%d \n", c);
return 0;
}
options:
A. 22
B. 28
C. 7
D. compiler error
Answers
1. A
2. B
3. C
4. D
5. B
6. B
7. C
8. C
9. A
10. C
11. B
12. A
13. B
14. C
15. A
16. B
17. C
18. A
19. C
20. B
