Question 1

Look at the following statement. import java.util.Scanner;
This is an example of

Accepted Answer

A)  a wildcard import 
B)  an explicit import 
C)  unconditional import 
D)  conditional import 
A)  a wildcard import 
B)  an explicit import 
C)  unconditional import 
D)  conditional import B

Question 2

A constructor is a method that is automatically called when an object is created.

Accepted Answer

A) True 
 B)False  True

Question 3

When a local variable in an instance method has the same name as an instance field, the instance field hides the local variable.

Accepted Answer

A) True 
 B)False  False

Question 4

A UML diagram does not contain:

Accepted Answer

A)  the class name 
B)  the method names 
C)  the field names 
D)  object names 
A)  the class name 
B)  the method names 
C)  the field names 
D)  object names

Question 5

For the following code, which statement is NOT true?
Public class Sphere
{
Private double radius;
Public double x;
Private double y;
Private double z;
}

Accepted Answer

A)  x is available to code that is written outside the Circle class. 
B)  radius is not available to code written outside the Circle class. 
C)  radius, x, y, and z are called members of the Circle class. 
D)  z is available to code that is written outside the Circle class. 
A)  x is available to code that is written outside the Circle class. 
B)  radius is not available to code written outside the Circle class. 
C)  radius, x, y, and z are called members of the Circle class. 
D)  z is available to code that is written outside the Circle class.

Question 6

Shadowing is the term used to describe where the field name is hidden by the name of a local or parameter variable.

Accepted Answer

A) True 
 B)False

Question 7

A class's responsibilities include:

Accepted Answer

A)  the things a class is responsible for doing 
B)  the things a class is responsible for knowing 
C)  both A and B 
D)  neither A nor B 
A)  the things a class is responsible for doing 
B)  the things a class is responsible for knowing 
C)  both A and B 
D)  neither A nor B

Question 8

Instance methods do not have this key word in their headers:

Accepted Answer

A)  public 
B)  static 
C)  private 
D)  protected 
A)  public 
B)  static 
C)  private 
D)  protected

Question 9

A constructor is a method that:

Accepted Answer

A)  returns an object of the class. 
B)  never receives any arguments. 
C)  with the name ClassName.constructor. 
D)  performs initialization or setup operations. 
A)  returns an object of the class. 
B)  never receives any arguments. 
C)  with the name ClassName.constructor. 
D)  performs initialization or setup operations.

Question 10

One or more objects may be created from a(n):

Accepted Answer

A)  field 
B)  class 
C)  method 
D)  instance 
A)  field 
B)  class 
C)  method 
D)  instance

Question 11

Which of the following is NOT involved in finding the classes when developing an object-oriented application?

Accepted Answer

A)  Describe the problem domain. 
B)  Identify all the nouns. 
C)  Write the code. 
D)  Refine the list of nouns to include only those that are relevant to the problem. 
A)  Describe the problem domain. 
B)  Identify all the nouns. 
C)  Write the code. 
D)  Refine the list of nouns to include only those that are relevant to the problem.

Question 12

What does the following UML diagram entry mean?
+ setHeight(h : double) : void

Accepted Answer

A)  this is a public attribute named Height and is a double data type 
B)  this is a private method with no parameters and returns a double data type 
C)  this is a private attribute named Height and is a double data type 
D)  this is a public method with a parameter of data type double and does not return a value 
A)  this is a public attribute named Height and is a double data type 
B)  this is a private method with no parameters and returns a double data type 
C)  this is a private attribute named Height and is a double data type 
D)  this is a public method with a parameter of data type double and does not return a value

Question 13

Which of the following statements will create a reference, str, to the string, "Hello, world"?
(1) String str = new String("Hello, world");
(2) String str = "Hello, world";

Accepted Answer

A)  1 
B)  2 
C)  1 and 2 
D)  neither 1 or 2 
A)  1 
B)  2 
C)  1 and 2 
D)  neither 1 or 2

Question 14

Given the following code, what will be the value of finalAmount when it is displayed?
Public class Order
{
Private int orderNum;
Private double orderAmount;
Private double orderDiscount;
Public Order(int orderNumber, double orderAmt,
Double orderDisc)
{
OrderNum = orderNumber;
OrderAmount = orderAmt;
OrderDiscount = orderDisc;
}
Public int getOrderAmount()
{
Return orderAmount;
}
Public int getOrderDisc()
{
Return orderDisc;
}
}
Public class CustomerOrder
{
Public static void main(String[] args)
{
Int ordNum = 1234;
Double ordAmount = 580.00;
Double discountPer = .1;
Order order;
Double finalAmount = order.getOrderAmount() -
Order.getOrderAmount() * order.getOrderDisc();
System.out.printf("Final order amount = $%,.2f
",
FinalAmount);
}
}

Accepted Answer

A)  528.00 
B)  580.00 
C)  There is no value because the constructor has an error. 
D)  There is no value because the object order has not been created. 
A)  528.00 
B)  580.00 
C)  There is no value because the constructor has an error. 
D)  There is no value because the object order has not been created.

Question 15

Instance methods do not have the key word static in their headers.

Accepted Answer

A) True 
 B)False

Question 16

Class objects normally have ________ that perform useful operations on their data, but primitive variables do not.

Accepted Answer

A)  fields 
B)  instances 
C)  methods 
D)  relationships 
A)  fields 
B)  instances 
C)  methods 
D)  relationships

Question 17

You should not define a class field that is dependent upon the values of other class fields:

Accepted Answer

A)  in order to avoid having stale data 
B)  because it is redundant 
C)  because it should be defined in another class 
D)  in order to keep it current 
A)  in order to avoid having stale data 
B)  because it is redundant 
C)  because it should be defined in another class 
D)  in order to keep it current

Question 18

Which of the following are classes from the Java API?

Accepted Answer

A)  Scanner 
B)  Random 
C)  PrintWriter 
D)  All of the above 
A)  Scanner 
B)  Random 
C)  PrintWriter 
D)  All of the above

Question 19

After the header, the body of the method appears inside a set of:

Accepted Answer

A)  brackets, [] 
B)  parentheses, () 
C)  braces, {} 
D)  double quotes, "" 
A)  brackets, [] 
B)  parentheses, () 
C)  braces, {} 
D)  double quotes, ""

Question 20

The scope of a private instance field is:

Accepted Answer

A)  the instance methods of the same class 
B)  inside the class, but not inside any method 
C)  inside the parentheses of a method header 
D)  the method in which they are defined 
A)  the instance methods of the same class 
B)  inside the class, but not inside any method 
C)  inside the parentheses of a method header 
D)  the method in which they are defined

Look at the following statement. import java.util.Scanner; This is an example of

A constructor is a method that is automatically called when an object is created.

When a local variable in an instance method has the same name as an instance field, the instance field hides the local variable.

A UML diagram does not contain:

For the following code, which statement is NOT true? Public class Sphere { Private double radius; Public double x; Private double y; Private double z; }

Shadowing is the term used to describe where the field name is hidden by the name of a local or parameter variable.

A class's responsibilities include:

Instance methods do not have this key word in their headers:

A constructor is a method that:

One or more objects may be created from a(n):

Which of the following is NOT involved in finding the classes when developing an object-oriented application?

What does the following UML diagram entry mean? + setHeight(h : double) : void

Which of the following statements will create a reference, str, to the string, "Hello, world"? (1) String str = new String("Hello, world"); (2) String str = "Hello, world";

Instance methods do not have the key word static in their headers.

Class objects normally have ________ that perform useful operations on their data, but primitive variables do not.

You should not define a class field that is dependent upon the values of other class fields:

Which of the following are classes from the Java API?

After the header, the body of the method appears inside a set of:

The scope of a private instance field is:

Introduction to Computers and Java

Java Fundamentals

Decision Structures

Loops and Files

Methods

Arrays and the Arraylist Class

A Second Look at Classes and Objects

Text Processing and More About Wrapper Classes

Inheritance

Exceptions and Advanced File IO

A First Look at GUI Applications

Advanced GUI Applications

Applets and More

Creating GUI Applications With Javafx and Scene Builder

Recursion

Databases

Filters

Exam 6: A First Look at Classes

Look at the following statement. import java.util.Scanner; This is an example of

A constructor is a method that is automatically called when an object is created.

When a local variable in an instance method has the same name as an instance field, the instance field hides the local variable.

A UML diagram does not contain:

For the following code, which statement is NOT true? Public class Sphere { Private double radius; Public double x; Private double y; Private double z; }

Shadowing is the term used to describe where the field name is hidden by the name of a local or parameter variable.

A class's responsibilities include:

Instance methods do not have this key word in their headers:

A constructor is a method that:

One or more objects may be created from a(n):

Which of the following is NOT involved in finding the classes when developing an object-oriented application?

What does the following UML diagram entry mean? + setHeight(h : double) : void

Which of the following statements will create a reference, str, to the string, "Hello, world"? (1) String str = new String("Hello, world"); (2) String str = "Hello, world";

Instance methods do not have the key word static in their headers.

Class objects normally have ________ that perform useful operations on their data, but primitive variables do not.

You should not define a class field that is dependent upon the values of other class fields:

Which of the following are classes from the Java API?

After the header, the body of the method appears inside a set of:

The scope of a private instance field is:

Introduction to Computers and Java

Java Fundamentals

Decision Structures

Loops and Files

Methods

Arrays and the Arraylist Class

A Second Look at Classes and Objects

Text Processing and More About Wrapper Classes

Inheritance

Exceptions and Advanced File IO

A First Look at GUI Applications

Advanced GUI Applications

Applets and More

Creating GUI Applications With Javafx and Scene Builder

Recursion

Databases

Filters