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Operators and Assignments - Programming

Q1:

What will be the output of the program? 
class Test 
{
    static int s;
    public static void main(String [] args) 
    {
        Test p = new Test();
        p.start();
        System.out.println(s);
    }

    void start() 
    {
        int x = 7;
        twice(x);
        System.out.print(x + ' ');
    }

    void twice(int x) 
    {
        x = x*2;
        s = x;
    }
}

A 7 7

B 7 14

C 14 0

D 14 14

ANS:A - 7 7

The int x in the twice() method is not the same int x as in the start() method. Start()'s x is not affected by the twice() method. The instance variable s is updated by twice()'s x, which is 14.