C Variables Test – 3

1. Array sizes are optional during array declaration by using ______ keyword.

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

    #include <stdio.h>
    static int x = 5;
    void main()
    {
        int x = 9;
        {
            x = 4;
        }
        printf("%d", x);
    } 

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

    #include <stdio.h>
    int x = 5;
    void main()
    {
        int x = 3;
        m();
        printf("%d", x);
    }
    void m()
    {
        x = 8;
        n();
    }
    void n()
    {
        printf("%d", x);
    }

4. What will be the sequence of allocation and deletion of variables in the following C code?

    #include <stdio.h>
    int main()
    {
        int a;
        {
            int b;
        }
    } 

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

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

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

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

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

    #include <stdio.h>
    void main()
    {
        {
            int x = 8;
        }
        printf("%d", x);
    }