Self-Review Exercises (Sections G.1–G.5)

G.1 Fill in the blanks in each of the following statements:

a) _____________ is a form of software reusability in which new classes acquire the members of existing classes and embellish those classes with new capabilities.

b) A superclass’s _____________ members can be accessed in the superclass declaration and in subclass declarations.

c) In a(n) _____________ relationship, an object of a subclass can also be treated as an object of its superclass.

d) In a(n) _____________ relationship, a class object has references to objects of other classes as members.

e) In single inheritance, a class exists in a(n) _____________ relationship with its subclasses.

f) A superclass’s _____________ members are accessible anywhere that the program has a reference to an object of that superclass or to an object of one of its subclasses.

g) When an object of a subclass is instantiated, a superclass _____________ is called implicitly or explicitly.

h) Subclass constructors can call superclass constructors via the _____________ keyword.

G.2 State whether each of the following is true or false. If a statement is false, explain why.

a) Superclass constructors are not inherited by subclasses.

b) A has-a relationship is implemented via inheritance.

c) A Car class has an is-a relationship with the SteeringWheel and Brakes classes.

d) When a subclass redefines a superclass method by using the same signature, the subclass is said to overload that superclass method.