Exam 10: Inheritance and Polymorphism

In object oriented programming, ____________ is used to create an "is a" relationship among classes.

The ____________ inherits fields, properties, and methods from the base class without any of them having to be rewritten.

A(n) ____________ is a property that appears in a base class, and must be overridden in a (non-abstract) derived class.

A class that is not intended to be instantiated but is to be used only as a base class is called a concrete class.

A method that accepts a base class variable as a parameter cannot accept a derived class variable as a parameter.

When you want to make sure a specific constructor from the base class is used, the derived class constructor must explicitly call the base class constructor using the ____________.

To allow a property to be overridden, you must include the virtual keyword in the property's declaration in the _________ class.

Only methods in a derived class can directly access the base class's private members.

A(n) ____________ is a method with no body that appears in a base class, and must be overridden in a (non-abstract) derived class.

To declare a class as abstract, you use the ____________ in the class header.

The ____________ declares that a method in the derived class overrides a method in the base class.

Properties in a base class can be overridden in the same way that methods can be overridden.

If a derived class introduces additional methods, properties, or fields, a base class reference variable cannot access them.

In object-oriented programming, the ___________ is more general than classes related to it.

You can think of a derived class as an extended version of some base class.

When one object is a specialized version of another object, there is a(n) ____________ between them.

Inheritance involves a base class and a relative class.

When program code instatiates a derived class object, the base class constructor executes first, followed by the derived class constructor.

If you want to create an abstract read-only property, leave out the set accessor.

When a derived class method has the same name as a base class method, it is often said that the derived class method ____________ the base class method.