Question 1

Methods that can be called directly through the class name and do not need to have an object instantiated are called _________________.

Accepted Answer

A)  final 
B)  public 
C)  static 
D)  private 
E)  none of the above 
A)  final 
B)  public 
C)  static 
D)  private 
E)  none of the above C

Question 2

Write a method called maxOfThree that accepts three integer parameters and returns the largest of the three.

Accepted Answer

public int maxOfThree(int firstInt, int secondInt, int thirdInt)  {
		if(firstInt >= secondInt && firstInt >= thirdInt)
			return firstInt;
		else if(secondInt >= firstInt && secondInt >= thirdInt)
			return secondInt;
		else
			return thirdInt;
	}

Question 3

A method that has multiple definitions is an __________________ method.

Accepted Answer

A)  overloaded 
B)  overridden 
C)  overlooked 
D)  overclocked 
E)  none of the above 
A)  overloaded 
B)  overridden 
C)  overlooked 
D)  overclocked 
E)  none of the above A

Question 4

When an object is passed to a method, the actual and formal parameters become aliases.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following object-oriented principles refers to the fact that an object should have its data guarded from inappropriate access?

Accepted Answer

A)  encapsulation 
B)  inheritance 
C)  polymorphism 
D)  instance variables 
E)  methods 
A)  encapsulation 
B)  inheritance 
C)  polymorphism 
D)  instance variables 
E)  methods

Question 6

__________________ parameters are the values that are used when calling a method.

Accepted Answer

A)  formal 
B)  actual 
C)  useful 
D)  informal 
E)  none of the above 
A)  formal 
B)  actual 
C)  useful 
D)  informal 
E)  none of the above

Question 7

Write a method called randomAverage that generates 100 random integers in the range 1 to 100 (inclusive) and returns their average. You may assume that the class has a static Random object called generator already declared and instantiated.

Accepted Answer

public double randomAverage()

Question 8

Consider the following method.

public void changeValues(int i, Card c)  {
		i = 15;
		c.setSuit(“Clubs”);
	}

Now consider the following snippet of code that calls the method defined above.

int num = 12;
	Card fiveOfSpades = new Card(5, “Spades”);

System.out.println(“Before method call:”);
	System.out.println(num);
	System.out.println(fiveOfSpades.getSuit());

changeValues(num, fiveOfSpades);

System.out.println(“After method call:”);
	System.out.println(num);
	System.out.println(fiveOfSpades);

What is the output of this code?

Accepted Answer

Before method call:

Question 9

There are times when it is appropriate to return data from a method of a type that is inconsistent with the return type specified in the method header.

Accepted Answer

A) True 
 B)False

Question 10

Explain why method overloading is useful.

Accepted Answer

Method overloading is useful because it

Question 11

What is encapsulation? How can it be enforced in Java?

Accepted Answer

Encapsulation is the principle that obje

Question 12

Write a method called countSpaces that takes in a String as a parameter and returns an integer that represents the number of space characters (' ') contained in the string, false otherwise..

Accepted Answer

public int countSpaces(String

Question 13

An object can be thought of as a blueprint for a set of classes.

Accepted Answer

A) True 
 B)False

Question 14

A variable can always be referenced anywhere in a program.

Accepted Answer

A) True 
 B)False

Question 15

What is the difference between an object and a class?

Accepted Answer

A class can be thought of as t

Question 16

Which of the following types of methods do not have any return type (not even a void return type)?

Accepted Answer

A)  methods declared as static 
B)  methods declared as public 
C)  methods declared as private 
D)  constructors 
E)  all of the above have return types 
A)  methods declared as static 
B)  methods declared as public 
C)  methods declared as private 
D)  constructors 
E)  all of the above have return types

Question 17

In a class that has variables called height and width, methods called getHeight() and getWidth() are examples of accessor methods.

Accepted Answer

A) True 
 B)False

Question 18

A(n) ________________ is a step-by-step process for solving a problem.

Accepted Answer

A)  UML diagram 
B)  aggregate object 
C)  class 
D)  algorithm 
E)  none of the above 
A)  UML diagram 
B)  aggregate object 
C)  class 
D)  algorithm 
E)  none of the above

Question 19

Write a method called randomInRange that takes in two numbers representing a range. Print an error message and return zero if the second parameter is less than the first. Otherwise, the method should return a randomly generated integer in that range (inclusive). You may assume that the class has a static Random object called generator already declared and instantiated.

Accepted Answer

public int randomInRange(int a

Question 20

All methods (with the exception of constructors) must specify a return type. What is the return type for a method that does not return any values?

Accepted Answer

A)  int 
B)  public 
C)  double 
D)  void 
E)  none of the above 
A)  int 
B)  public 
C)  double 
D)  void 
E)  none of the above

Methods that can be called directly through the class name and do not need to have an object instantiated are called _________________.

Write a method called maxOfThree that accepts three integer parameters and returns the largest of the three.

A method that has multiple definitions is an __________________ method.

When an object is passed to a method, the actual and formal parameters become aliases.

Which of the following object-oriented principles refers to the fact that an object should have its data guarded from inappropriate access?

__________________ parameters are the values that are used when calling a method.

Write a method called randomAverage that generates 100 random integers in the range 1 to 100 (inclusive) and returns their average. You may assume that the class has a static Random object called generator already declared and instantiated.

There are times when it is appropriate to return data from a method of a type that is inconsistent with the return type specified in the method header.

Explain why method overloading is useful.

What is encapsulation? How can it be enforced in Java?

Write a method called countSpaces that takes in a String as a parameter and returns an integer that represents the number of space characters (' ') contained in the string, false otherwise..

An object can be thought of as a blueprint for a set of classes.

A variable can always be referenced anywhere in a program.

What is the difference between an object and a class?

Which of the following types of methods do not have any return type (not even a void return type)?

In a class that has variables called height and width, methods called getHeight() and getWidth() are examples of accessor methods.

A(n) ________________ is a step-by-step process for solving a problem.

All methods (with the exception of constructors) must specify a return type. What is the return type for a method that does not return any values?

Introduction

Data and Expressions

Using Classes and Objects

Conditionals and Loops

Graphical User Interfaces

Arrays

Inheritance

Polymorphism

Recursion

Exceptions

Searching and Sorting

Trees

Introduction to Collections and Stacks

Heaps and Priority Queues

Graphs

Filters

Exam 5: Writing Classes

Methods that can be called directly through the class name and do not need to have an object instantiated are called _________________.

Write a method called maxOfThree that accepts three integer parameters and returns the largest of the three.

A method that has multiple definitions is an __________________ method.

When an object is passed to a method, the actual and formal parameters become aliases.

Which of the following object-oriented principles refers to the fact that an object should have its data guarded from inappropriate access?

__________________ parameters are the values that are used when calling a method.

Write a method called randomAverage that generates 100 random integers in the range 1 to 100 (inclusive) and returns their average. You may assume that the class has a static Random object called generator already declared and instantiated.

There are times when it is appropriate to return data from a method of a type that is inconsistent with the return type specified in the method header.

Explain why method overloading is useful.

What is encapsulation? How can it be enforced in Java?

Write a method called countSpaces that takes in a String as a parameter and returns an integer that represents the number of space characters (' ') contained in the string, false otherwise..

An object can be thought of as a blueprint for a set of classes.

A variable can always be referenced anywhere in a program.

What is the difference between an object and a class?

Which of the following types of methods do not have any return type (not even a void return type)?

In a class that has variables called height and width, methods called getHeight() and getWidth() are examples of accessor methods.

A(n) ________________ is a step-by-step process for solving a problem.

All methods (with the exception of constructors) must specify a return type. What is the return type for a method that does not return any values?

Introduction

Data and Expressions

Using Classes and Objects

Conditionals and Loops

Graphical User Interfaces

Arrays

Inheritance

Polymorphism

Recursion

Exceptions

Searching and Sorting

Trees

Introduction to Collections and Stacks

Heaps and Priority Queues

Graphs

Filters