Java | Class and Object | Question 7

Predict the output of the following program.

class Test
{
    int a = 1;
    int b = 2;

    Test func(Test obj)
    {
        Test obj3 = new Test();
        obj3 = obj;
        obj3.a = obj.a++ + ++obj.b;
        obj.b = obj.b;
        return obj3;
    }

    public static void main(String[] args)
    {
        Test obj1 = new Test();
        Test obj2 = obj1.func(obj1);

        System.out.println("obj1.a = " + obj1.a + "  obj1.b = " + obj1.b);
        System.out.println("obj2.a = " + obj2.a + "  obj1.b = " + obj2.b);

    }
}

(A)

obj1.a = 1  obj1.b = 2
obj2.a = 4  obj2.b = 3

(B)

obj1.a = 4  obj1.b = 3
obj2.a = 4  obj2.b = 3

(C) Compilation error


Answer: (B)

Explanation:
obj1 and obj2 refer to same memory address.

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