Reference no: EM13820753

1.The principle that you can apply your knowledge of a general category to more specific objects is_______.

a.polymorphism

b.encapsulation

c.inheritance

d.structure

 

2.Which of the following is not a benefit of using inheritance when creating a new class?

a.You save time, because you need not create fields and methods that already exist in a parent class.

b.You reduce the chance of errors, because the parent class methods have already been used and tested.

c.You make it easier for anyone who has used the parent class to understand the new class because the programmer can concentrate on the new features.

d.You save computer memory because when you create objects of the new class, storage is not required for parent class fields.

 

3.A child class is also called a(n)_______.

a.extended class

b.base class

c.superclass

d.delineated class

 

4.Assuming that the following classes are well named, which of the following is a parent class of House?

a.Apartment

b.Building

c.Victorian

d.myHouse

 

5.A derived class usually contains ____________ than its parent.

a.more fields and methods

b.the same number of fields but fewer methods

c.fewer fields but more methods

d.fewer fields and methods

 

6.When you create a class that is an extension or child of another class, you use a(n)___________ between the derived class name and its base class name.

a.ampersand

b.colon

c.dot

d.hyphen

 

7.A base class named Garden contains a private field width and a property public int Width that contains get and set accessors. A child class named VegetableGarden does not contain a Width property. When you write a class in which you declare an object as follows, what statement can you use to access the VegetableGarden's width?

VegetableGarden myGarden = new VegetableGarden();

a.myGarden.Width

b.myGarden.base.Width

c.VegetableGarden.Width

d.You cannot use Width with a VegetableGarden object.

 

8.When a parent class contains a private data field, the field is _____________ the child class.

a.hidden in

b.not a member of

c.directly accessible in

d.public in

 

9.When a base class and a derived class contain a method with the same name and argument list, and you call the method using a derived class object,_______.

a.you receive an error message

b.the base class version overrides the derived class version

c.the derived class version overrides the base class version

d.both method versions execute

 

10.Which of the following is an English-language form of polymorphism?

a.seeing a therapist and seeing the point

b.moving friends with a compelling story and moving friends to a new apartment

c.both of these

d.neither of these

 

11.When base and derived classes contain a method with the same name and argument list, you can use the base class method within the derived class by using the keyword ___________ before the method name.

a.new

b.override

c.base

d.super

 

12.In a program that declares a derived class object, you ______________ assign it to an object of its base class type.

a.can

b.cannot

c.must

d.should not (Farrell 359-361)

 

Farrell, Joyce. Microsoft® Visual C# 2008: An Introduction to Object-Oriented Programming, 3e, 3rd Edition. Cengage Learning, 05/2008. VitalBook file.

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