Question 1

What happens if you do not explicitly include an access specifier?

Accepted Answer

A)  Its access modifier will be public by default. 
B)  It will be assumed as an internal field. 
C)  Its access modifier will be private by default. 
D)  It will be set to protected.

Question 2

What are the set of attributes of an object's instance variable known as?

Accepted Answer

A)  The object's relationship. 
B)  The object's state. 
C)  The object's class instantiation. 
D)  The object's fields.

Question 3

Where are the data components of a class that differ for each object stored?

Accepted Answer

A)  Inside of instance variables. 
B)  In variable unit states. 
C)  Inside constants 
D)  Inside parent object relationships.

Question 4

What are the class access modifiers in C#?

Accepted Answer

The answer of What are the class access modifiers in...

Question 5

What class access modifier is used to indicate that access is limited to another class to which the class belongs?

Accepted Answer

A)  private 
B)  internal 
C)  protected 
D)  public

Question 6

A GUI object, such as a Button, is represented as an object that cannot encapsulate any methods.

Accepted Answer

A) True 
 B)False

Question 7

What happens when a method overrides another method?

Accepted Answer

A)  It instantiates that method and takes over its properties. 
B)  It takes precedence over the original method, hiding it. 
C)  It overloads the original method, allowing for varying parameters. 
D)  It extends the original method, adding additional functionality.

Question 8

What reference is passed implicitly and invisibly to every instance method and property accessor?

Accepted Answer

A)  static 
B)  object 
C)  use 
D)  this

Question 9

The Sort() method accepts an array as a parameter and arranges its elements in descending order.What complication arises when you sort an array of objects? Explain how to use the IComparable interface to address this problem.

Accepted Answer

The answer of The Sort() method accepts an array as...

Question 10

Explain what a destructor is and why it cannot be overloaded.

Accepted Answer

The answer of Explain what a destructor is and why...

Question 11

Classes that support simple data items each contain a method that provides the details of how items in the class compare to each other.What is the name of this method?

Accepted Answer

A)  Equals() 
B)  Less() 
C)  IndexOf() 
D)  CompareTo()

Question 12

A member of a class that provides access to a field of a class is referred to as what?

Accepted Answer

A)  implicit parameter 
B)  property 
C)  explicit parameter 
D)  reference type

Question 13

You can overload an operator for a built-in data type.For example, you can change the meaning of + between two ints.

Accepted Answer

A) True 
 B)False

Question 14

What kind of constructor takes no arguments whatsoever?

Accepted Answer

A)  object constructor 
B)  default constructor 
C)  construct initializer 
D)  construct array

Question 15

What class access modifier can be used to indicate that access to the class is limited to the class and to any classes derived from the class?

Accepted Answer

A)  internal 
B)  private 
C)  protected 
D)  public

Question 16

What do accessors do within the C# language?

Accepted Answer

A)  They define how an instantiation of a class behaves. 
B)  They control access to the various properties of a class. 
C)  They provide access to a field of a class. 
D)  They specify the statements that execute when a class's fields are accessed.

Question 17

Using private fields within classes is an example of what feature found in all object-oriented languages?

Accepted Answer

A)  information hiding 
B)  polymorphism 
C)  inheritance 
D)  overloading

Question 18

What is another name used for instance variables in order to help distinguish them from other variables you might use?

Accepted Answer

A)  states 
B)  relationships 
C)  instantiations 
D)  fields

Question 19

Briefly explain how to create instance variables, and show how to define a private integer instance variable called idNumber within a class called Employee.

Accepted Answer

The answer of Briefly explain how to create instance variables,...

Exam 9: Using Classes and Objects