Question

1. Given the following code, which objects are garbage collected and why?

Employee e1 = new Employee();

Employee e2 = new Employee();

Employee e3 = new Employee();

e1 = e2;

e3 = null;

2. Write minimal code for an interface called Dancer that has a single method called dance.

3. Write minimal code for a class called TapDancer that implements the Dancer interface and implements the dance() method by calling the tap() method four times. Assume tap() is already implemented.

Answer 1

1)
e1 and e3 are garbage collected.

2)
interface Dancer {
    void dance();
}

3)
class TapDancer implements Dancer {
    public void dance() {
        tap();tap();tap();tap();
    }
}