Chapter 10

Question 1

True or False:
A class is an example of a structured data type.

Answer 1

True

Question 2

True or False:
In C++, class is a reserved word and it defines only a data type.

Answer 2

True

Question 3

True or False:
If the heading of a member function of a class ends with the word const, then the function member cannot modify the private member variables, but it can modify the public member variables.

Answer 3

False

Question 4

True or False:
In C++ terminology, a class object is the same as a class instance.

Answer 4

True

Question 5

True or False:
Given this declaration:
class myClass
{
public:
void print(); //Output the value of x;
MyClass();
private:
int x;
};
MyClass myObject;
The following statement is legal:
myObject.x = 10;

Answer 5

False

Question 6

True or False:
If an object is declared in the definition of a member function of the class, then the object can access both the public and private members of the class.

Answer 6

True

Question 7

True or False:
If an object is created in a user program, then the object can access both the public and private members of the class.

Answer 7

False

Question 8

True or False:
You can use arithmetic operators to perform arithmetic operations on class objects.

Answer 8

False

Question 9

True or False:
As parameters to a function, class objects can be passed by reference only.

Answer 9

False

Question 10

True or False:
The public members of a class must be declared before the private members.

Answer 10

False

Question 11

The components of a class are called the ________ of the class

Answer 11

members

Question 12

Which of the following class definitions is correct in C++?

Answer 12

class studentType
{
public:
void setData(string, double, int);
private:
string name;
};

Question 13

If a member of a class is ________, you cannot access it outside the class.

Answer 13

private

Question 14

A class and its members can be described graphically using a notation known as the ____ notation.

Answer 14

UML

Question 15

The word ______ at the end of several of the member functions in the accompanying figure class clockType specifies that these functions cannot modify the member variables of a clockType object.

Answer 15

const

Question 16

Consider the UML class diagram shown in the accompanying figure. Which of the following is the name of the class?

Answer 16

clocktype

Question 17

Consider the UML class diagram shown in the accompanying figure. According to the UML class diagram, how many private members are in the class?

Answer 17

three

Question 18

A __ sign in front of a member name on a UML diagram indicates that this member is a public member.

Answer 18

+

Question 19

A __ sign in front of a member name on a UML diagram indicates that this member is a protected member.

Answer 19

#

Question 20

class rectangleType
{
public:
void setLengthWidth(double x, double y);
void print() const;
double area();
double perimeter();
rectangleType();
rectangleType(double x, double y);
private:
double length;
double width;
};
Consider the accompanying class definition. Which of the following variable declarations is correct?

Answer 20

rectangleType rectangle;

Question 21

class rectangleType
{
public:
void setLengthWidth(double x, double y);
void print() const;
double area();
double perimeter();
rectangleType();
rectangleType(double x, double y);
private:
double length;
double width;
};
Consider the accompanying class definition and the declaration: rectangleType bigRect;
Which of the following statements is correct?

Answer 21

bigRect.print();

Question 22

class rectangleType
{
public:
void setLengthWidth(double x, double y);
void print() const;
double area();
double perimeter();
rectangleType();
rectangleType(double x, double y);
private:
double length;
double width;
};
Consider the accompanying class definition and the object declaration: rectangleType bigRect(14, 10);
Which of the following statements is correct?

Answer 22

bigRect.setLengthWidth(3.0, 2.0);

Question 23

In C++, the _____ is called the member access operator.

Answer 23

.(dot)

Question 24

A class object can be __________. That is, it is created each time the control reaches its declaration, and destroyed when the control exits the surrounding block.

Answer 24

automatic

Question 25

A class object can be _____. That is, it can be created once, when the control reaches its declaration, and destroyed when the program terminates.

Answer 25

static

Question 26

In C++, you can pass a variable by reference and still prevent the function from changing its value by using the keyword ______ in the formal parameter declaration.

Answer 26

const

Question 27

In C++, the scope resolution operator is ___.

Answer 27

::

Question 28

A member function of a class that only accesses the value(s) of the data member(s) is called a(n) _______ function.

Answer 28

accessor

Question 29

To guarantee that the member variables of a class are initialized, you use ____________.

Answer 29

constructors

Question 30

class secretType
{
public:
static int count;
static int z;

secretType();
secretType(int a);
void print();
static void incrementY();
private:
int x;
static int y;
}
Consider the accompanying class definition. How many constructors are present in the class definition?

Answer 30

two

Question 31

How many destructors can a class have?

Answer 31

one

Question 32

A destructor has a character ___, followed by the name of the class.

Answer 32

~(tilde)

Question 33

What does ADT stand for?

Answer 33

abstract data type

Question 34

Which of the following is true about classes and structs?

Answer 34

By default, all members of a struct are public and all members of a class are private.

Question 35

If a function of a class is static, it is declared in the class definition using the keyword static in its _________.

Answer 35

heading

Question 36

With __________ functions, the definitions of the member functions are placed in the implementation file.

Answer 36

header

Question 37

If a class object is passed by _____, the contents of the member variables of the actual parameter are copied into the corresponding member variables of the formal parameter.

Answer 37

value

Question 38

Non-static member variables of a class are called the _________ variables of the class.

Answer 38

instance

Question 39

A program or software that uses and manipulates the objects of a class is called a(n) _________ of that class

Answer 39

client

Question 40

A(n) __________ function of a class changes the values of the member variable(s) of the class.

Answer 40

mutator

Question 41

A(n) ____________ contains the definitions of the functions to implement the operations of an object.

Answer 41

implementation file

Question 42

The header file is also known as the __________.

Answer 42

interface file

Question 43

A(n) ____________ is a statement specifying the condition(s) that must be true before the function is called.

Answer 43

precondition