Calling Class Methods Practice Test

Consider the following class for a car rental service. The CarRental class stores how many cars are available. It has methods rentCar(int n) to reduce availability if enough cars exist and returnCar(int n) to increase availability. It also has getAvailable() that returns the current number available. A program instantiates CarRental cr = new CarRental(5); then calls cr.rentCar(2). The expected output of getAvailable() reflects the new availability. If getAvailable() is called next, what is the expected result?

Consider the following class for a library system. The Library class tracks how many copies of a title are available. It has methods addBooks(int n) to increase copies and issueBook() to decrease copies by 1 if possible. It also has getCopies() that returns the current number of copies. A program instantiates Library lib = new Library("Dune", 2); then calls lib.issueBook() once. The expected output of getCopies() shows the updated count. If getCopies() is called next, what is the expected result?