C Questions

1. What is the output of C Program.?

int main()
{
    int a=14;
    
    while(a<20)
    {
        ++a;
        if(a>=16 && a<=18)
        {
            continue;
        }
        printf("%d ", a);
       
    }

    return 0;
}

2. In C, parameters are always 

3. The standard header _______ is used for variable list arguments (…) in C.

4. What is the default return type if it is not specified in function definition?

5. Which option should be selected to work the following C expression?

string p = "HELLO";

6. What will be the output of the following C code?

        #include 

        struct p

        {

            int k;

            char c;

            float f;

        };

        int p = 10;

        int main()

        {

            struct p x = {1, 97};

            printf("%f %dn", x.f, p);

        }

7. What will be the output of the following code snippet?

#include 
void solve() {
    int first = 10, second = 20;
    int third = first + second;
    {
        int third = second - first;
        printf("%d ", third);
    }
    printf("%d", third);
}
int main() {
solve();
return 0;
}

8. What is the output of C Program.?

int main()
{
    int a=10,b=20;
    
    if(a==9 AND b==20)
    {
        printf("Hurray..");
    }
    
    if(a==10 OR b==21)
    {
        printf("Theatre");
    }

    return 0;
}

9. Which of the following is the correct syntax to declare a 3 dimensional array using pointers?

10. What will be the output of the following C code?

        #include 

        int main()

        {

            int a = 1, b = 2, c = 3;

            int *ptr1 = &a, *ptr2 = &b, *ptr3 = &c;

            int **sptr = &ptr1; //-Ref

            *sptr = ptr2;

        }

11. What will be the output of the following C code considering the size of a short int is 2, char is 1 and int is 4 bytes?

        #include 

        int main()

        {

            short int i = 20;

            char c = 97;

            printf("%d, %d, %dn", sizeof(i), sizeof(c), sizeof(c + i));

            return 0;

        }

12. What will be the output of the following code snippet?

#include 
void solve() {
    int ch = 2;
    switch(ch) {
        case 1: printf("1 ");
        case 2: printf("2 ");
        case 3: printf("3 ");
        default: printf("None");
    }
}
int main() {
    solve();
return 0;
}

13. How are String represented in memory in C?

14. Why do variable names beginning with the underscore is not encouraged?

15. What will be the output of the following C code?

        #include 

        struct student

        {

            char *name;

        };

        struct student s[2];

        void main()

        {

            s[0].name = "alan";

            s[1] = s[0];

            printf("%s%s", s[0].name, s[1].name);

            s[1].name = "turing";

            printf("%s%s", s[0].name, s[1].name);

        }