To hide or display the result of the macro while it runs, add the ________ action to a macro

In Lync, a white presence indicator means that Lync cannot tell if the contact is online

Indicate whether the statement is true or false

Suppose that Horse is a subclass of Animal, and neither class is abstract. Which of the following is an invalid declaration and initialization?

a) Horse h = new Horse(); b) Horse h = new Animal(); c) Animal a = new Animal(); d) Animal a = new Horse(); e) all of the above are valid