C Programming Mock Test 3

1. C preprocessors can have compiler specific features.

2. Functions can return structure in C?

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

    #include <stdio.h>
    register int x;
    void main()
    {
        printf("%d", x);
    } 

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

    #include <stdio.h>
    int x = 5;
    void main()
    {
        int x = 3;
        printf("%d", x);
        {
            int x = 4;
        }
        printf("%d", x);
    } 

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

    #include <stdio.h>
    int main()
    {
        int i = 0, j = 0;
        while (l1: i < 2)
        {
            i++;
            while (j < 3)
            {
                printf("loop\n");
                goto l1;
            }
        }
   } 

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

    #include <stdio.h>
    void main()
    {
        static int x = 3;
        x++;
        if (x <= 5)
        {
            printf("hi");
            main();
        }
    }

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

    #include <stdio.h>
    void foo(auto int i);
    int main()
    {
        foo(10);
    }
    void foo(auto int i)
    {
        printf("%d\n", i );
    }

8. Which among the following is the correct syntax to declare a static variable register?

9. Functions can return enumeration constants in C?

10. Assignment statements assigning value to local static variables are executed only once.