Question 1

Write the constructor, which is passed the player's name and position.

Accepted Answer

public BaseballPlayer(String newName, St

Question 2

What happens if you declare a class constructor to have a void return type?

Accepted Answer

A)  You'll likely receive a syntax error 
B)  The program will compile with a warning, but you'll get a runtime error 
C)  There's nothing wrong with declaring a constructor to be void 
D)  The class' default constructor will be used instead of the one you're declaring 
E)  None of the above 
A)  You'll likely receive a syntax error 
B)  The program will compile with a warning, but you'll get a runtime error 
C)  There's nothing wrong with declaring a constructor to be void 
D)  The class' default constructor will be used instead of the one you're declaring 
E)  None of the above

Question 3

Write the constructor for this class.

Accepted Answer

public Building(int

Question 4

For the questions below, use the following class definition.
import java.text.DecimalFormat;
public class Student
{
private String name;
private String major;
private double gpa;
private int hours;
public Student(String newName, String newMajor, double newGPA, int newHours)
{
name = newName;
major = newMajor;
gpa = newGPA;
hours = newHours;
}
public String toString( )
{
DecimalFormat df = new DecimalFormat("xxxx"); // xxxx needs to be replaced
return name + "
" + major + "
" + df.format(gpa) + "
" + hours
}
}
-Another method that might be desired is one that updates the Student's number of credit hours. This method will receive a number of credit hours and add these to the Student's current hours. Which of the following methods would accomplish this?

Accepted Answer

A)  public int updateHours( ) { return hours; } 
B)  public void updateHours( ) { hours++; } 
C)  public updateHours(int moreHours) { hours += moreHours; } 
D)  public void updateHours(int moreHours) { hours += moreHours; } 
E)  public int updateHours(int moreHours) { return hours + moreHours; } 
A)  public int updateHours( ) { return hours; } 
B)  public void updateHours( ) { hours++; } 
C)  public updateHours(int moreHours) { hours += moreHours; } 
D)  public void updateHours(int moreHours) { hours += moreHours; } 
E)  public int updateHours(int moreHours) { return hours + moreHours; }

Question 5

Consider a method defined with the header: public void foo(int a, int b). Which of the following method calls is legal?

Accepted Answer

A)  foo(0, 0.1); 
B)  foo(0 / 1, 2 * 3); 
C)  foo(0); 
D)  foo( ); 
E)  foo(1 + 2, 3 * 0.1); 
A)  foo(0, 0.1); 
B)  foo(0 / 1, 2 * 3); 
C)  foo(0); 
D)  foo( ); 
E)  foo(1 + 2, 3 * 0.1);

Question 6

Write a statement to instantiate a cube with a length of 3, width of 3, and height of 3.

Accepted Answer

Box cube =

Question 7

The following method header definition will result in a syntax error: public void aMethod( );

Accepted Answer

A) True 
 B)False

Question 8

For the questions below, use the following class definition.
import java.text.DecimalFormat;
public class Student
{
private String name;
private String major;
private double gpa;
private int hours;
public Student(String newName, String newMajor, double newGPA, int newHours)
{
name = newName;
major = newMajor;
gpa = newGPA;
hours = newHours;
}
public String toString( )
{
DecimalFormat df = new DecimalFormat("xxxx"); // xxxx needs to be replaced
return name + "
" + major + "
" + df.format(gpa) + "
" + hours
}
}
-Which of the following could be used to instantiate a new Student s1?

Accepted Answer

A)  Student s1 = new Student( ); 
B)  s1 = new Student( ); 
C)  Student s1 = new Student("Jane Doe", "Computer Science", 3.333, 33); 
D)  new Student s1 = ("Jane Doe", "Computer Science", 3.333, 33); 
E)  new Student(s1); 
A)  Student s1 = new Student( ); 
B)  s1 = new Student( ); 
C)  Student s1 = new Student("Jane Doe", "Computer Science", 3.333, 33); 
D)  new Student s1 = ("Jane Doe", "Computer Science", 3.333, 33); 
E)  new Student(s1);

Question 9

The expressions that are passed to a method in an invocation are called

Accepted Answer

A)  actual parameters 
B)  formal parameters 
C)  formal arguments 
D)  formals 
E)  any of the above 
A)  actual parameters 
B)  formal parameters 
C)  formal arguments 
D)  formals 
E)  any of the above

Question 10

Listener objects "wait" for an event to occur.

Accepted Answer

A) True 
 B)False

Question 11

Java methods can return only primitive types (int, double, float, char, boolean, etc).

Accepted Answer

A) True 
 B)False

Question 12

Which of the following Applet methods is called automatically when the applet is first loaded?

Accepted Answer

A)  Applet (the Applet's constructor) 
B)  init 
C)  start 
D)  getCodeBase 
E)  getImage 
A)  Applet (the Applet's constructor) 
B)  init 
C)  start 
D)  getCodeBase 
E)  getImage

Question 13

Consider the "Push Me!" program described in section 4.7. As given the push counter starts at zero and is incremented each time the "Push Me!" button is pressed. Let's say that you want to add a class called ResetListener that resets the count to zero. Write the ResetListener class.

Accepted Answer

private class ResetListener implements A

Question 14

A class' constructor usually defines

Accepted Answer

A)  how an object is initialized 
B)  how an object is interfaced 
C)  the number of instance data in the class 
D)  the number of methods in the class 
E)  if the instance data are accessible outside of the object directly 
A)  how an object is initialized 
B)  how an object is interfaced 
C)  the number of instance data in the class 
D)  the number of methods in the class 
E)  if the instance data are accessible outside of the object directly

Question 15

Write a statement to output the volume of the blue box.

Accepted Answer

System.out.println("

Question 16

Every class definition must include a constructor.

Accepted Answer

A) True 
 B)False

Write the constructor, which is passed the player's name and position.

What happens if you declare a class constructor to have a void return type?

Write the constructor for this class.

Consider a method defined with the header: public void foo(int a, int b). Which of the following method calls is legal?

Write a statement to instantiate a cube with a length of 3, width of 3, and height of 3.

The following method header definition will result in a syntax error: public void aMethod( );

The expressions that are passed to a method in an invocation are called

Listener objects "wait" for an event to occur.

Java methods can return only primitive types (int, double, float, char, boolean, etc).

Which of the following Applet methods is called automatically when the applet is first loaded?

Consider the "Push Me!" program described in section 4.7. As given the push counter starts at zero and is incremented each time the "Push Me!" button is pressed. Let's say that you want to add a class called ResetListener that resets the count to zero. Write the ResetListener class.

A class' constructor usually defines

Write a statement to output the volume of the blue box.

Every class definition must include a constructor.

Introduction

Data and Expressions

Using Classes and Objects

Conditionals and Loops

More Conditionals and Loops

Object-Oriented Design

Arrays

Inheritance

Polymorphism

Exceptions

Recursion

Collections

Filters

Exam 4: Writing Classes

Write the constructor, which is passed the player's name and position.

What happens if you declare a class constructor to have a void return type?

Write the constructor for this class.

Consider a method defined with the header: public void foo(int a, int b). Which of the following method calls is legal?

Write a statement to instantiate a cube with a length of 3, width of 3, and height of 3.

The following method header definition will result in a syntax error: public void aMethod( );

The expressions that are passed to a method in an invocation are called

Listener objects "wait" for an event to occur.

Java methods can return only primitive types (int, double, float, char, boolean, etc).

Which of the following Applet methods is called automatically when the applet is first loaded?

Consider the "Push Me!" program described in section 4.7. As given the push counter starts at zero and is incremented each time the "Push Me!" button is pressed. Let's say that you want to add a class called ResetListener that resets the count to zero. Write the ResetListener class.

A class' constructor usually defines

Write a statement to output the volume of the blue box.

Every class definition must include a constructor.

Introduction

Data and Expressions

Using Classes and Objects

Conditionals and Loops

More Conditionals and Loops

Object-Oriented Design

Arrays

Inheritance

Polymorphism

Exceptions

Recursion

Collections

Filters