Exam 9: Inheritance

All fields declared in an interface

This shows the inheritance relationships among classes in a manner that is similar to a family tree.

In Java, a reference variable is ________ because it can reference objects of types different from its own, as long as those types are related to its type through inheritance.

If a subclass constructor does not explicitly call a superclass constructor,

When a class contains an abstract method, you cannot create an instance of the class.

In an inheritance relationship, the subclass constructor always executes before the superclass constructor.

In the following statement, which is the superclass? Public class ClassA extends ClassB implements ClassC

When a class does not use the extends key word to inherit from another class, Java automatically extends it from the ________ class.

When a class implements an interface, an inheritance relationship known as ________ is established.

All methods specified by an interface are

Because every class directly or indirectly inherits from the Object class, every class inherits the Object class's members.

Because the subclass is more specialized than the superclass, it is sometimes necessary for the subclass to replace inadequate superclass methods with more suitable ones.

If a method in a subclass has the same signature as a method in the superclass, the subclass method overrides the superclass method.

A subclass can directly access

Protected class members can be denoted in a UML diagram with the ________ symbol.

In a class hierarchy,

A(n) ________ is a method that appears in a superclass, but expects to be overridden in a subclass.

In the following statement, which is the interface? Public class ClassA extends ClassB implements ClassC

When a subclass overrides a superclass method, only the subclass's version of the method can be called with a subclass object.

In the following statement, which is the subclass? Public class ClassA extends ClassB implements ClassC