C Programming Quiz

1. Which of the following typecasting is accepted by C?

Widening conversions
Narrowing conversions
Widening & Narrowing conversions
None of the above

2. How many times value of j is checked in the below code ?

#include 
    int main()
    {
        int j = 0;
        do {
            j++;
            printf("");
        } while (j < 5);
    }

3
4
5
1

3. Is the NULL pointer same as an uninitialised pointer?

Yes
No
May Be
Can't Say

4. What is the output of this program?

    #include <stdio.h>
    int main()
    {
        int i;
        for (i = 0;i < 5; i++)
        int a = i;
        printf("%d", a);
    }

Syntax error in declaration of a
No errors, program will show the output 5
Redeclaration of a in same scope throws error
a is out of scope when printf is called

5. The size of the following union, where an int occupies 4 bytes of memory is

union demo
{
  float x;
  int y;
  char z[10];
};

8 byte
4 byte
10 byte
18 byte

6. Local variables are stored in an area called ___________

Heap
Permanent storage area
Free memory
Stack

7. What is the output of this program?

int main()
{
 
    int a = 1, b = 0;
    int c = a%2 ? a++ : a-- ? a=0 : ++b ? b = 2 : b++ ;
    printf("%d", c);
    return 0;
}

1
2
3
0

8. The time() function is defined in __________ header file.

ctime.h
time.h
clock.h
date.h

9. asctime() structure contents are interpreted by this function as calendar time.

Yes
No
Can be yes or no
Can not say

10. What will be output for the following code?

#include <stdio.h>
main()
{
    int num=5;
    int fun(int num);
    printf(""%d"",fun(num));
}
int fun(int num)
{
    if(num>0)
        return(num+fun(num-2));
}

6
7
8
9