Inheritance Review, Chapter 13 object review, Ch 15 - C++

Members of a class object may be accessed through a pointer to the object by using the _________ operator.

The Arrow is the Pointer Operator -->

f

a member function of a derived class may not have the same name as a member function of the base class

a class is very similar to an ___

a structure

The base class access specification determines how __ members in the base class may be accessed by derived classes

a,b,c (private, public, protected

When a derived class has two or more base classes, the situation is known as

multiple inheritance

Arguments are passed to the base class destructor function by the __ class a __ function

none of these ( derived, constructor; derived, destructor;base,constructor; base,destructor)

The following statement allows the __ members of the Car class to access __ members of the Vehicle class. class Car: private Vehicle

none of these (private, private; public, private; protected, private; public, protected)

___ programming is centered around objects

object

A virtual function is a member function that expects to be __ in a derived class

overridden

A class may have more than one constructor, as long as each has a different _________.

parameter list

__ to a base class may be assigned the address of a derived class object

pointers

t

pointers to a base class may be assigned the address of a derived class object

The term __ means the ability to take many forms

polymorphism

When member functions behave differently, depending upon which object performed the call, this is an example of __

polymorphism

The default access specification of class members is ____

private

__ members of a base class are never accessible to a derived class

private

Protected members of a base class are like __, but they may be accessed by derived classes

private members

t

private members of a private base class become inaccessible to the derived class

___ programming is centered around functions or procedures

procedural

two common programming methods in practice today are

procedural programming, object-oriented programming

private

protected members of a base class are like __________ members, except they may be accessed by derived classes.

f

protected members of a private base class become public members of the derived class

t

protected members of a public base class become protected members of the derived class

The default access specification of a struct in C++ is _________.

public

t

public members of a private base class become private members of the derived class

f

public members of a protected base class become inaccessible to the derived class

Constructors cannot have a(n) _________ type.

return

Like constructors, destructors cannot have a(n) _________ type.

return

When the compiler binds a member function call with the version of the function that resides in the same class as the call itself, this is considered __ binding

static

f

the base class constructor is called after the derived class constructor

t

the base class destructor is called after the derived class destructor

f

the base class's access specification affects the way base class member functions may access base class member variables

t

the base class's access specification affects the way the derived class inherits members of the base class

A destructor has the same name as the class, but is preceded by a(n) _________ character.

tilde ~

.65. T F Constructors may have default arguments.

true

52. T F Class members are private by default.

true

54. T F Classes and structures in C++ are very similar.

true

57. T F It is legal to define a pointer to a class object.

true

58. T F You can use the new operator to dynamically allocate an instance of a class.

true

61. T F Constructors may not have a return type.

true

63. T F Destructors cannot take arguments.

true

66. T F Member functions may be overloaded.

true

68. T F A class may not have a constructor with no parameter list, and a constructor whose arguments all have default values.

true

69. T F A class may only have one destructor.

true

72. T F A class s responsibilities are the things the class is responsible for knowing, and actions the class must perform.

true

In the statement class car:public vehicle, which is the base class?

vehicle

A virtual function is declared by placing the keyword __ in front of the return type in the base class's function declaration

virtual

__ functions are dynamically bound by the compiler

virtual

A __ of a base class expects to be overridden in a derived class

virtual function

first

when both a base class and a derived class have constructors, the base class's constructor is called ________

last

when both a base class and a derived class have destructors, the base class's destructor is called _______

A contractor uses a blueprint to build a set of identical houses. Are classes analogous to the blueprint or the houses?

A class is analogous to the blueprint.

What are a class's responsibilities?

A class's responsibilities are the things that the class is responsible for knowing and the actions that the class is responsible for doing.

What is a mutator function? What is an accessor function?

A mutator stores a value in a private member variable or changes its value in some way; An Accessor retrieves a value from a private member variable and do not change an object's data, so marked const

51. T F Private members must be declared before public members.

False

55. T F All private members of a class must be declared together.

False

How do you identify the classes in a problem domain description?

Identify all the nouns and pronouns in the problem domain description. Each of these is a potential class. then refine the list to include only the classes that are relevant to the problem.

When a member function s body is written inside a class declaration, the function is _________.

Inline

Defining a class object is often called the _________ of a class.

Instantiation

When defining an array of class objects, how do you pass arguments to the constructor for each object in the array?

Item inventory[4] = { Item("Hammer", 8, 9), "Wrench", Item("Pliers") }; Where inventory[3] calls the default constructor.

members

a derived class inherits __________ of its base class

When you derive a class from an existing class, you __ add new data and functions

may

Polymorphism is when __ in a class hierarchy perform differently, depending upon which object performs the call

member functions

____ is an object's ability to contain and manipulate its own data

Encapsulation

The difference between a class and an instance of the class is ___

A class describes a data type. An instance of a class is an object of the data type that exists in memory.

If you were writing the external definitions of the Canine class s member functions, you would save them in a file named _________.

Canine.cpp

If you were writing the declaration of a class named Canine, what would you name the file it was stored in? _________

Canine.h

In the following statement which is the derived class? class Car: protected Vehicle

Car

What is a default constructor? Is it possible to have more than one default?

Constructor that takes no arguments; No you cannot have more than one

A(n) _________ constructor is one that requires no arguments.

Default

Is it possible to have more than one constructor? Destructor?

May have more than one as long as each has a different parameter list; Only one per class for destructor

What is a constructor? What is a deconstructor?

Member function that is automatically called when an object is created, constructs an object, function name is same as class name; same but when object is destroyed, name is ~className;

The difference between a structure and a class is ___

Members of a struct are public by default, while they are private by default in classes

The default access specification of class members is _________.

Private

In an inheritance situation, the new class that you create from an existing class is known as the

a and c (derived class, child class)

f

a base class may not be derived from another class

Can you think of a good reason to avoid writing statements in a class member function that use cout or cin?

They are global variables so you can't control when they are called

Under what circumstances should a member function be private?

When the function is necessary for internal processing, but not useful to the program outside the class. In some cases a class may contain member functions that initialize member variables or destroy their contents. Those functions should not be accessible by an external part of the program because they may be called at the wrong time.

Is it a good idea to make member variables private? Why or why not?

Yes it is. This protects the variables from being directly manipulated by code outside the class, and prevents them from receiving invalid data.

If a class object is dynamically allocated in memory, does its constructor execute? If so, when?

Yes, the constructor executes when the object is created.

The base class's __ affects the way its members are inherited by the derived class

access specification

an _____ is a key word inside a class declaration that establishes a member's accessibility

access specifier

Multiple inheritance opens the opportunity for a derived class to have __ members

ambiguous

t

arguments are passed to the base class constructor by the derived class constructor

In the following statement, what is being protected? class car: protected vehicle

base class members

The __ constructor is called before the __ constructor

base, derived

the ____ is the construct primarily used to create objects

class

. A(n) _________ is a member function with the same name as the class.

constructor

A(n) _________ is automatically called when an object is created.

constructor

A class may only have one default _________ and one _________.

constructor and deconstructor

_________ are useful for performing initialization or setup routines in a class object.

constructors

A constructor whose arguments all have default values is a(n) _________ constructor.

default

The __ destructor is called before the __ destructor

derived, base

Multiple inheritance is when a __ class has __ base classes

derived, two or more

A(n) _________ is a member function that is automatically called when an object is destroyed.

destructor

The compiler performs __on virtual functions

dynamic binding

.53. T F Members of a struct are private by default.

false

56. T F All public members of a class must be declared together.

false

59. T F A private member function may be called from a statement outside the class, as long as the statement is in the same program as the class declaration.

false

60. T F Constructors do not have to have the same name as the class.

false

62. T F Constructors cannot take arguments.

false

64. T F Destructors may return a value.

false

67. T F Constructors may not be overloaded.

false

70. T F When an array of objects is defined, the constructor is only called for the first element.

false

71. T F To find the classes needed for an object-oriented application, you identify all of the verbs in a description of the problem domain.

false

void Circle::getRadius() The name of the function is ____

getRadius

__ allows us to create new classes based on existing classes

inheritance

__ is commonly used to extend a class, or to give it additional capabilities

inheritance

A(n) _________ may be used to pass arguments to the constructors of elements in an object array.

initialization

f

it isn't possible for a base class to have more than one constructor