Question 1

Which of the following is NOT an initial value assigned to an object's data field by a default constructor?

Accepted Answer

A)  numeric fields set to 0 
B)  Boolean fields set to true 
C)  character fields set to Unicode '\u0000' 
D)  a field of object references set to null

Question 2

An application's main() method must have a void return type.

Accepted Answer

A) True 
 B)False

Question 3

Access specifiers are sometimes called access ____________________.

Accepted Answer

The answer of Access specifiers are sometimes called access ____________________....

Question 4

Match between columns
                        Premises: Data components of a class
Variables you declare within a class, but outside of any method
Used to return a value back to the calling method
Are called class methods
Included within the method declaration parentheses
The first line of a method
An application or a class that instantiates objects of another prewritten class
Variables in the method declaration that accept the values from the actual parameters
The combination of the method name and the number, types, and order of arguments

Accepted Answer

The Answer of formal parameters and method's signature and instance is...

Question 5

Methods that retrieve values are called ____ methods.

Accepted Answer

A)  static 
B)  accessor 
C)  class 
D)  mutator

Question 6

What are the two parts of every method? Describe them.

Accepted Answer

The answer of What are the two parts of every...

Question 7

When creating a method that requires multiple parameters, why would a programmer need to understand a method's signature, and why must a method call match the called method's signature?

Accepted Answer

The answer of When creating a method that requires multiple...

Question 8

You can identify a class that is an application because it contains a public static void main() method.

Accepted Answer

A) True 
 B)False

Question 9

The interface is the part of a method that the method's client does not see.

Accepted Answer

A) True 
 B)False

Question 10

A method body provides information about how other methods can interact with it.

Accepted Answer

A) True 
 B)False

Question 11

Describe what a public access class is and when you would use one.

Accepted Answer

The answer of Describe what a public access class is...

Question 12

Identify and describe the four components that make up the method header above.

Accepted Answer

The answer of  
Identify and describe the four components...

Question 13

When a value is returned from a method, you are required to use the value when the method is called.

Accepted Answer

A) True 
 B)False

Question 14

A unique identifier is most likely used as a ____ key in a database.

Accepted Answer

A)  special 
B)  public 
C)  static 
D)  primary

Question 15

A(n) ____ is a program module that contains a series of statements that carry out a task.

Accepted Answer

A)  argument 
B)  method 
C)  application 
D)  declaration

Question 16

Method names that begin with ____ and set are very typical.

Accepted Answer

A)  next 
B)  call 
C)  read 
D)  get

Question 17

What are the possible results if arguments to a method are passed in the wrong order?

Accepted Answer

The answer of What are the possible results if arguments...

Question 18

public class Employee 
{ 
private int empNum; 
private double empSalary; 
public void setEmpNum(int emp) 
{ 
empNum = emp; 
}  
public void setEmpSalary(double sal) 
{ 
empSalary = sal; 
} 
} 
Given the class defined in the code above, write the Java statements that will create a new employee instance called employee15 and assign an empNum of 15 and empSalary of 500.00 to that employee instance.

Accepted Answer

The answer of public class Employee 
{ 
private int empNum;...

Question 19

____ is a principle of object-oriented programming that describes the encapsulation of method details within a class.

Accepted Answer

A)  An interface 
B)  A calling method 
C)  Implementation hiding 
D)  Instantiation

Question 20

A method's identifier must be more than one word, must have embedded spaces, and can be a Java keyword.

Accepted Answer

A) True 
 B)False

Exam 3: Using Methods Classes and Objects

Which of the following is NOT an initial value assigned to an object's data field by a default constructor?

An application's main() method must have a void return type.

Access specifiers are sometimes called access ____________________.

Match each term with the correct statement below.

Methods that retrieve values are called ____ methods.

What are the two parts of every method? Describe them.

When creating a method that requires multiple parameters, why would a programmer need to understand a method's signature, and why must a method call match the called method's signature?

You can identify a class that is an application because it contains a public static void main() method.

The interface is the part of a method that the method's client does not see.

A method body provides information about how other methods can interact with it.

Describe what a public access class is and when you would use one.

Identify and describe the four components that make up the method header above.

When a value is returned from a method, you are required to use the value when the method is called.

A unique identifier is most likely used as a ____ key in a database.

A(n) ____ is a program module that contains a series of statements that carry out a task.

Method names that begin with ____ and set are very typical.

What are the possible results if arguments to a method are passed in the wrong order?

____ is a principle of object-oriented programming that describes the encapsulation of method details within a class.

A method's identifier must be more than one word, must have embedded spaces, and can be a Java keyword.