Deck 14: Creating Classes and Objects

Question 1

By convention, the names of the Private variables in a class start with a(n) ____.

A) slash ( / )
B) underscore ( _ )
C) pound sign ( # )
D) ampersand ( & )

Answer 1

B

Question 2

A(n) ____ can represent something found in real life, such as a wristwatch or a car.

A) object
B) property
C) method
D) argument

Answer 2

A

Question 3

____ are the operations (actions) that the object is capable of performing.

A) Objects
B) Events
C) Methods
D) Arguments

Answer 3

C

Question 4

Each object is an instance of the ____ from which it is created.

A) parameter
B) class
C) procedure
D) variable

Question 5

In OOP, the term ____ means to enclose in a class.

A) abstract
B) encapsulate
C) inherit
D) incorporate

Question 6

The Private variables of a class are visible to applications that contain an instance of the class.

Question 7

The Get statement begins with the keyword Get and ends with the keywords Return Get.

Question 8

____ are the actions to which an object can respond.

A) Objects
B) Events
C) Methods
D) Arguments

Question 9

The ____ of a class are most often represented by Private variables and Public properties.

A) objects
B) methods
C) behaviors
D) attributes

Question 10

In Visual Basic, you can define your own classes and then create instances from those classes.

Question 11

To instantiate a class-level object variable, you use the ____ keyword.

A) Public
B) Dim
C) Private
D) Property

Question 12

The only type of method which can be overloaded is a constructor.

Question 13

A(n) ____ encapsulates all of the attributes and behaviors of the object it instantiates.

A) argument
B) procedure
C) parameter
D) class

Question 14

The ____ of a class are represented by methods, which can be Sub or Function procedures.

A) behaviors
B) attributes
C) objects
D) parameters

Question 15

The Class statement begins with ____.

A) the keywords Start Class, followed by the name of the class
B) the name of the class, followed by the keywords Start Class
C) the keywords Public Class, followed by the name of the class
D) the name of the class, followed by the keywords Public Class

Question 16

The Class statement ends with the ____ clause.

A) End Class
B) Public Class
C) Exit Class
D) Dim Class

Question 17

In its simplest form, the Class statement can be used in place of the Structure statement.

Question 18

When a variable in a class is declared using the ____ keyword, it can be accessed by any application that contains an instance of the class.

A) Module
B) Private
C) Dim
D) Public

Question 19

The convention is to use ____ case for the names of the Public variables in a class.

A) Camel
B) Pascal
C) AllCaps
D) SmallCaps

Question 20

You use the ____ keyword to instantiate a procedure-level object variable.

A) Public
B) Dim
C) Private
D) Property

Question 21

A constructor begins with the keywords ____.

A) Public Sub New
B) Public Constructor
C) Private Constructor
D) Private New

Question 22

Match each item with a statement below.
a.Property procedure
f.behavior
b.attribute
g.ReadOnly keyword
c.Set block
h.New keyword
d.Private keyword
i.WriteOnly keyword
e.Get block
Allows an application to assign a value to the Private variable associated with a property

Question 23

Match each item with a statement below.
a.Property procedure
f.behavior
b.attribute
g.ReadOnly keyword
c.Set block
h.New keyword
d.Private keyword
i.WriteOnly keyword
e.Get block
Allows an application to retrieve the contents of the Private variable associated with a property

Question 24

Match each item with a statement below.
a.Property procedure
f.behavior
b.attribute
g.ReadOnly keyword
c.Set block
h.New keyword
d.Private keyword
i.WriteOnly keyword
e.Get block
Used to declare a variable that is not visible to applications that contain an instance of the class

Question 25

The classes that you define must specify the attributes and ____________________ of the objects they create.

Question 26

You can write a(n) ____ as either a Function procedure or a Sub procedure.

A) attribute
B) method
C) parameter
D) Property procedure

Question 27

Match each item with a statement below.
a.Property procedure
f.behavior
b.attribute
g.ReadOnly keyword
c.Set block
h.New keyword
d.Private keyword
i.WriteOnly keyword
e.Get block
Used in a Property procedure header to indicate that you are creating a property whose value can be retrieved by an application but cannot be set by the application

Question 28

Match each item with a statement below.
a.Property procedure
f.behavior
b.attribute
g.ReadOnly keyword
c.Set block
h.New keyword
d.Private keyword
i.WriteOnly keyword
e.Get block
Characteristic that describes the object

Question 29

When an application needs to assign data to or retrieve data from a Private variable in a class, it must use a(n) ____ property to do so.

A) Private
B) Public
C) class
D) object

Question 30

The Set statement begins with the keyword Set and ends with the keywords ____.

A) End Set
B) Return Set
C) Complete Set
D) Exit Set

Question 31

Match each item with a statement below.
a.Property procedure
f.behavior
b.attribute
g.ReadOnly keyword
c.Set block
h.New keyword
d.Private keyword
i.WriteOnly keyword
e.Get block
Used in a Property procedure header to indicate that an application can set the property's value, but it cannot retrieve the value

Question 32

You should use ____ to name a property.

A) nouns and verbs
B) verbs
C) adverbs and adjectives
D) nouns and adjectives

Question 33

Constructors that contain parameters are called ____________________ constructors.

Question 34

____ enable you to specify the property of a class in one line of code.

A) System properties
B) Auto-implemented properties
C) Restricted properties
D) Class-delivered properties

Question 35

After you define a class, you can then use the class to instantiate one or more ____________________.

Question 36

A constructor that has no parameters is called the ____________________ constructor.

Question 37

Match each item with a statement below.
a.Property procedure
f.behavior
b.attribute
g.ReadOnly keyword
c.Set block
h.New keyword
d.Private keyword
i.WriteOnly keyword
e.Get block
Can be used to create a Public property

Question 38

Match each item with a statement below.
a.Property procedure
f.behavior
b.attribute
g.ReadOnly keyword
c.Set block
h.New keyword
d.Private keyword
i.WriteOnly keyword
e.Get block
Includes methods and events

Question 39

Match each item with a statement below.
a.Property procedure
f.behavior
b.attribute
g.ReadOnly keyword
c.Set block
h.New keyword
d.Private keyword
i.WriteOnly keyword
e.Get block
Used to create an object

Question 40

An application cannot access the ____________________ variables in a class.

Question 41

How can you make the Private members of a class available to an application?

Question 42

What is meant by overloaded methods and when is overloading of methods useful?

Question 43

To allow for salaried employees that are paid on a schedule other than the standard, what is the header for the appropriate method to retrieve their gross salary?

Question 44

What is a method's signature?

Question 45

For the class Student, how you would create the auto-implemented string property of Firstname?

Question 46

What are the steps to add a class file to the current project?

Question 47

What are the rules for naming methods?

Question 48

Describe a Property procedure header.

Question 49

Although you can define a class that contains only attributes represented by Public variables, it is rarely done. Describe the disadvantage of using Public variables in a class.

Question 50

What is a constructor? What is the purpose of a constructor?