Assume the declaration of the method xMethod is as follows. This means that xMet

Question

Assume the declaration of the method xMethod is as follows. This means that xMethod is sent one object that is an array of double values.

            public static void xMethod(double [ ] a);

            Which of the following could be used to call xMethod?

        a.     xMethod(5.7);

       b.     xMethod(“this one is correct”);

       c.     double [ ] z = {8.4, 9.3, 10.7};

                xMethod( z[2] );

        d.     double [ ] z;

                z = new double[6];

                xMethod( z );

Explanation / Answer

public static void xMethod(double [ ] a);

            Which of the following could be used to call xMethod?

        a.     xMethod(5.7);
       
       b.     xMethod(“this one is correct”);
       
       c.     double [ ] z = {8.4, 9.3, 10.7};
                xMethod( z[2] );
       
        d.     double [ ] z;
                z = new double[6];
                xMethod( z );

The correct option is d.
                double [ ] z;
                z = new double[6];
                xMethod( z );
Because in option a. instead of object a value is passed in the method. And same is the case with option b. and c. a value is passed in method.
But in option d. the object of a double array is being passed which is same as mentioned in the method declaration.

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