Question 1

Describe fully qualified identifiers and explain why they are necessary.

Accepted Answer

A complete name that includes the class is a fully qualified identifier. If you want to use a method in another class, the compiler does not recognize the method unless you use the full name. A fully qualified identifier includes the class time, a dot, and the method name.

Question 2

Often, programmers list the ____________________ first because it is the first method used when an object is created.

Accepted Answer

constructor

Question 3

public int getStudentNum() 
{ 
return studentNum; 
} 
In the above code, identify if the method is a mutator method or an accessor method. Describe how the two types of methods differ and how they are similar.

Accepted Answer

Methods that set or change field values are called mutator methods; methods that retrieve 
 values are called accessor methods. In Java, mutator methods conventionally start with the 
 prefix set , and accessor methods conventionally start with the prefix get . Using these three-letter prefixes with your method names is not required, but it is conventional. 
 The method in the above code is an accessor method because it retrieves studentNum.

Question 4

Does a programmer need to write every class he or she uses? Why or why not?

Accepted Answer

The same programmer does not need to  wr

Question 5

After an object has been instantiated, its methods can be accessed using the object's _____, a dot, and a method call.

Accepted Answer

A)  identifier 
B)  class 
C)  operator 
D)  output 
A)  identifier 
B)  class 
C)  operator 
D)  output

Question 6

Parentheses in a method declaration contain parameters that are "dropped into" the method.

Accepted Answer

A) True 
 B)False

Question 7

What is a method and how is one used?

Accepted Answer

A method is a program module that contai

Question 8

public Employee() 
{ 
empSalary = 300.00; 
} 
The above code shows the Employee class constructor. What is a constructor and how would this default constructor operate?

Accepted Answer

A constructor establishes an object. A d

Question 9

In order to allocate the needed memory for an object, you must use the ____ operator.

Accepted Answer

A)  new 
B)  main 
C)  type 
D)  return 
A)  new 
B)  main 
C)  type 
D)  return

Question 10

public static void predictRaise(double salary) 
{ 
double newSalary; 
final double RAISE_RATE = 1.10; 
newSalary = salary * RAISE_RATE; 
System.out.println("Current salary: " + 
salary + " After raise: " + 
newSalary); 
} 
In the above code, what are the parameter data type and parameter identifier? How do you identify each?

Accepted Answer

When you write the method declaration fo

Question 11

The name of the ____ is always the same as the name of the class whose objects it constructs.

Accepted Answer

A)  method 
B)  constructor 
C)  argument 
D)  variable 
A)  method 
B)  constructor 
C)  argument 
D)  variable

Question 12

How does the order in which methods appear in a class affect how the application executes? Please explain.

Accepted Answer

The order in which methods appear in a c

Question 13

When an application is run, the method that must be executed first must be named ____.

Accepted Answer

A)  first() 
B)  void() 
C)  main() 
D)  final() 
A)  first() 
B)  void() 
C)  main() 
D)  final()

Question 14

A major advantage of a method is that it is easily reusable. What does it mean to reuse a method and what are the advantages of doing so?

Accepted Answer

After a method is created, you

Question 15

Any class can contain an unlimited number of methods.

Accepted Answer

A) True 
 B)False

Question 16

How do you use a value returned from a method? Provide an example.

Accepted Answer

If a method returns a value, then when y

Question 17

Data items you use in a call to a method are called ____.

Accepted Answer

A)  arguments 
B)  instance variables 
C)  method declarations 
D)  headers 
A)  arguments 
B)  instance variables 
C)  method declarations 
D)  headers

Question 18

In the above code, the calculateBonus() method acts as a "black box." What does this mean?

Accepted Answer

The predictRaise method calls the calcul

Question 19

Normally, you declare constructors to be ____________________ so that other classes can instantiate objects that belong to the class.

Accepted Answer

The answer of Normally, you declare constructors to be ____________________...

Question 20

Public classes are accessible by all objects, which means that public classes can be ____, or used as a basis for any other class.

Accepted Answer

A)  saved 
B)  extended 
C)  copied 
D)  used 
A)  saved 
B)  extended 
C)  copied 
D)  used

Describe fully qualified identifiers and explain why they are necessary.

Often, programmers list the ____________________ first because it is the first method used when an object is created.

public int getStudentNum() { return studentNum; } In the above code, identify if the method is a mutator method or an accessor method. Describe how the two types of methods differ and how they are similar.

Does a programmer need to write every class he or she uses? Why or why not?

After an object has been instantiated, its methods can be accessed using the object's _____, a dot, and a method call.

Parentheses in a method declaration contain parameters that are "dropped into" the method.

What is a method and how is one used?

public Employee() { empSalary = 300.00; } The above code shows the Employee class constructor. What is a constructor and how would this default constructor operate?

In order to allocate the needed memory for an object, you must use the ____ operator.

The name of the ____ is always the same as the name of the class whose objects it constructs.

How does the order in which methods appear in a class affect how the application executes? Please explain.

When an application is run, the method that must be executed first must be named ____.

A major advantage of a method is that it is easily reusable. What does it mean to reuse a method and what are the advantages of doing so?

Any class can contain an unlimited number of methods.

How do you use a value returned from a method? Provide an example.

Data items you use in a call to a method are called ____.

In the above code, the calculateBonus() method acts as a "black box." What does this mean?

Normally, you declare constructors to be ____________________ so that other classes can instantiate objects that belong to the class.

Public classes are accessible by all objects, which means that public classes can be ____, or used as a basis for any other class.

Creating Java Programs

Using Data

More Object Concepts

Making Decisions

Looping

Characters Strings and the Stringbuilder

Arrays

Advanced Array Concepts

Introduction to Inheritance

Advanced Inheritance Concepts

Exception Handling

File Input and Output

Introduction to Swing Components

Advanced Gui Topics

Graphics

Filters

Exam 3: Using Methods Classes and Objects

Describe fully qualified identifiers and explain why they are necessary.

Often, programmers list the ____________________ first because it is the first method used when an object is created.

public int getStudentNum() { return studentNum; } In the above code, identify if the method is a mutator method or an accessor method. Describe how the two types of methods differ and how they are similar.

Does a programmer need to write every class he or she uses? Why or why not?

After an object has been instantiated, its methods can be accessed using the object's _____, a dot, and a method call.

Parentheses in a method declaration contain parameters that are "dropped into" the method.

What is a method and how is one used?

public Employee() { empSalary = 300.00; } The above code shows the Employee class constructor. What is a constructor and how would this default constructor operate?

In order to allocate the needed memory for an object, you must use the ____ operator.

The name of the ____ is always the same as the name of the class whose objects it constructs.

How does the order in which methods appear in a class affect how the application executes? Please explain.

When an application is run, the method that must be executed first must be named ____.

A major advantage of a method is that it is easily reusable. What does it mean to reuse a method and what are the advantages of doing so?

Any class can contain an unlimited number of methods.

How do you use a value returned from a method? Provide an example.

Data items you use in a call to a method are called ____.

In the above code, the calculateBonus() method acts as a "black box." What does this mean?

Normally, you declare constructors to be ____________________ so that other classes can instantiate objects that belong to the class.

Public classes are accessible by all objects, which means that public classes can be ____, or used as a basis for any other class.

Creating Java Programs

Using Data

More Object Concepts

Making Decisions

Looping

Characters Strings and the Stringbuilder

Arrays

Advanced Array Concepts

Introduction to Inheritance

Advanced Inheritance Concepts

Exception Handling

File Input and Output

Introduction to Swing Components

Advanced Gui Topics

Graphics

Filters