Q.1.
Identify which of the following are declarations
| 1 : | extern int x; |
| 2 : | float square ( float x ) { ... } |
| 3 : | double pow(double, double); |
-
1 -
2 -
1 and 3 -
3
Q.2.
Is there any difference between following declarations?
| 1 : | extern int fun(); |
| 2 : | int fun(); |
-
Both are identical -
No difference, except extern int fun(); is probably in another file -
int fun(); is overrided with extern int fun(); -
None of these
Q.3.
What is the output of the program
#include<stdio.h>
int main()
{
struct emp
{
char name[20];
int age;
float sal;
};
struct emp e = {"Tiger"};
printf("%d, %f\n", e.age, e.sal);
return
}
-
0, 0.000000 -
Garbage values -
Error -
None of above
Q.4.
In the following program where is the variable a getting defined and where it is getting declared?
#include<stdio.h>
int main()
{
extern int a;
printf("%d\n", a);
return}
int a=-
extern int a is declaration, int a = 20 is the definition -
int a = 20 is declaration, extern int a is the definition -
int a = 20 is definition, a is not defined -
a is declared, a is not defined
Q.5.
How would you round off a value from 1.to 2.0?
-
ceil(1.66) -
floor(1.66) -
roundup(1.66) -
roundto(1.66)
Q.6.
What is the output of the program?
#include<stdio.h>
int main()
{
union a
{
int i;
char ch[2];
};
union a u;
u.ch[= u.ch[= printf("%d, %d, %d\n", u.ch[0], u.ch[1], u.i);
return}
-
3, 2, 515 -
515, 2, 3 -
3, 2, 5 -
None of these
Explanation
