Question 1

Classes that depend on field names from parent classes are said to be ____ because they are prone to errors.

Accepted Answer

A)  solid 
B)  fixed 
C)  fragile 
D)  sound 
A)  solid 
B)  fixed 
C)  fragile 
D)  sound C

Question 2

When a derived class contains a method or property that overrides a parent class method or property, you might have occasion to use the parent class version within the subclass. If so, you can use the keyword base to access the parent class method or property. For example:
class CommissionEmployee : Employee
{
new public string GetGreeting(
{
string greeting = base.GetGreeting();
greeting += "\nI work on commission.");
return greeting;
}
}

Accepted Answer

When a derived class contains a method or property that overrides a parent class method or property, you might have occasion to use the parent class version within the subclass. If so, you can use the keyword base to access the parent class method or property. For example: 
class CommissionEmployee : Employee 
{ 
new public string GetGreeting( 
{ 
string greeting = base.GetGreeting();
greeting += "
I work on commission."); 
return greeting; 
} 
}

Question 3

A(n) ____ class is one from which you cannot create concrete objects, but from which you can inherit.

Accepted Answer

A)  abstract 
B)  concrete 
C)  base 
D)  derived 
A)  abstract 
B)  concrete 
C)  base 
D)  derived A

Question 4

A class's ToString() method is often a useful debugging aid.

Accepted Answer

A) True 
 B)False

Question 5

A ____ is a synonym for a derived class.

Accepted Answer

A)  parent class 
B)  superclass 
C)  base class 
D)  subclass 
A)  parent class 
B)  superclass 
C)  base class 
D)  subclass

Question 6

A base class member that is not hidden by the derived class is ____ in the derived class.

Accepted Answer

A)  overridden 
B)  removed 
C)  visible 
D)  eliminated 
A)  overridden 
B)  removed 
C)  visible 
D)  eliminated

Question 7

If a base class and a derived class have methods with the same names but different parameter lists, the derived class method overrides the base class method.

Accepted Answer

A) True 
 B)False

Question 8

Briefly describe the four public instance methods of the Object class.

Accepted Answer

The Object class contains a constructor,

Question 9

The ability to inherit from more than one class is called ____.

Accepted Answer

A)  polymorphism 
B)  interfacing 
C)  collaboration 
D)  multiple inheritance 
A)  polymorphism 
B)  interfacing 
C)  collaboration 
D)  multiple inheritance

Question 10

A(n) ____ data field or method can be used within its own class or in any classes extended from that class, but it cannot be used by "outside" classes.

Accepted Answer

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

Question 11

Show an example of a class definition that creates a subclass of an existing Employee class, and adds a private double field called commissionRate . What is the total set of fields that an instance of the new class contains?

Accepted Answer

The class definition provided should be

Question 12

When you use information hiding by selecting which properties and methods of a class to make public, you are assured that your data will be altered only by the properties and methods you choose and only in ways that you can control.

Accepted Answer

A) True 
 B)False

Question 13

Every class you create in C# derives from a single class named ____.

Accepted Answer

A)  System.Console 
B)  System.Object 
C)  System.Class 
D)  Object.System 
A)  System.Console 
B)  System.Object 
C)  System.Class 
D)  Object.System

Question 14

When a derived class contains a method that overrides a parent class method, you can use the keyword ____ to access the parent class method from within the derived class.

Accepted Answer

A)  base 
B)  super 
C)  upper 
D)  parent 
A)  base 
B)  super 
C)  upper 
D)  parent

Question 15

The entire list of parent classes from which a child class is derived constitutes the ____________________ of the subclass.

Accepted Answer

The answer of The entire list of parent classes from...

Question 16

The keyword ____ always refers to the superclass of the class in which you use it.

Accepted Answer

A)  super 
B)  parent 
C)  upper 
D)  base 
A)  super 
B)  parent 
C)  upper 
D)  base

Question 17

A superclass contains all the fields and methods of its subclasses as well as its own more specific fields and methods.

Accepted Answer

A) True 
 B)False

Question 18

When all base class constructors require arguments, you must include a constructor for each derived class you create. Why?

Accepted Answer

When a base class constructor requires a

Question 19

Inheritance is ____________________, which means a child inherits all the members of all its ancestors.

Accepted Answer

The answer of Inheritance is ____________________, which means a child...

Question 20

Reusing existing classes and interfaces makes the job of programming easier. What are some of the future advantages that come from writing extendable base classes?

Accepted Answer

When you create a useful, extendable bas

Classes that depend on field names from parent classes are said to be ____ because they are prone to errors.

When a derived class contains a method or property that overrides a parent class method or property, how can you use the parent class version from within the subclass? Show an example of a derived class that overrides a parent class method, but then uses the parent class method.

A(n) ____ class is one from which you cannot create concrete objects, but from which you can inherit.

A class's ToString() method is often a useful debugging aid.

A ____ is a synonym for a derived class.

A base class member that is not hidden by the derived class is ____ in the derived class.

If a base class and a derived class have methods with the same names but different parameter lists, the derived class method overrides the base class method.

Briefly describe the four public instance methods of the Object class.

The ability to inherit from more than one class is called ____.

A(n) ____ data field or method can be used within its own class or in any classes extended from that class, but it cannot be used by "outside" classes.

Show an example of a class definition that creates a subclass of an existing Employee class, and adds a private double field called commissionRate . What is the total set of fields that an instance of the new class contains?

When you use information hiding by selecting which properties and methods of a class to make public, you are assured that your data will be altered only by the properties and methods you choose and only in ways that you can control.

Every class you create in C# derives from a single class named ____.

When a derived class contains a method that overrides a parent class method, you can use the keyword ____ to access the parent class method from within the derived class.

The entire list of parent classes from which a child class is derived constitutes the ____________________ of the subclass.

The keyword ____ always refers to the superclass of the class in which you use it.

A superclass contains all the fields and methods of its subclasses as well as its own more specific fields and methods.

When all base class constructors require arguments, you must include a constructor for each derived class you create. Why?

Inheritance is ____________________, which means a child inherits all the members of all its ancestors.

Reusing existing classes and interfaces makes the job of programming easier. What are some of the future advantages that come from writing extendable base classes?

A First Program Using C

Using Data

Using Gui Objects and the Visual Studio Ide

Making Decisions

Looping

Using Arrays

Using Methods

Advanced Method Concepts

Using Classes and Objects

Exception Handling

Using Controls

Handling Events

Files and Streams

Filters

Exam 10: Introduction to Inheritance

Classes that depend on field names from parent classes are said to be ____ because they are prone to errors.

When a derived class contains a method or property that overrides a parent class method or property, how can you use the parent class version from within the subclass? Show an example of a derived class that overrides a parent class method, but then uses the parent class method.

A(n) ____ class is one from which you cannot create concrete objects, but from which you can inherit.

A class's ToString() method is often a useful debugging aid.

A ____ is a synonym for a derived class.

A base class member that is not hidden by the derived class is ____ in the derived class.

If a base class and a derived class have methods with the same names but different parameter lists, the derived class method overrides the base class method.

Briefly describe the four public instance methods of the Object class.

The ability to inherit from more than one class is called ____.

A(n) ____ data field or method can be used within its own class or in any classes extended from that class, but it cannot be used by "outside" classes.

Show an example of a class definition that creates a subclass of an existing Employee class, and adds a private double field called commissionRate . What is the total set of fields that an instance of the new class contains?

When you use information hiding by selecting which properties and methods of a class to make public, you are assured that your data will be altered only by the properties and methods you choose and only in ways that you can control.

Every class you create in C# derives from a single class named ____.

When a derived class contains a method that overrides a parent class method, you can use the keyword ____ to access the parent class method from within the derived class.

The entire list of parent classes from which a child class is derived constitutes the ____________________ of the subclass.

The keyword ____ always refers to the superclass of the class in which you use it.

A superclass contains all the fields and methods of its subclasses as well as its own more specific fields and methods.

When all base class constructors require arguments, you must include a constructor for each derived class you create. Why?

Inheritance is ____________________, which means a child inherits all the members of all its ancestors.

Reusing existing classes and interfaces makes the job of programming easier. What are some of the future advantages that come from writing extendable base classes?

A First Program Using C

Using Data

Using Gui Objects and the Visual Studio Ide

Making Decisions

Looping

Using Arrays

Using Methods

Advanced Method Concepts

Using Classes and Objects

Exception Handling

Using Controls

Handling Events

Files and Streams

Filters