Question 1

You cannot use the == operator to compare the contents of:

Accepted Answer

A)  objects 
B)  strings 
C)  integers 
D)  Boolean values 
A)  objects 
B)  strings 
C)  integers 
D)  Boolean values

Question 2

An instance of a class does not have to exist in order for values to be stored in a class's static fields.

Accepted Answer

A) True 
 B)False

Question 3

The only limitation that static methods have is:

Accepted Answer

A)  they can refer to only non-static members of the class 
B)  they can only be called from static members of the class 
C)  they must be declared as public methods 
D)  they cannot refer to non-static members of the class 
A)  they can refer to only non-static members of the class 
B)  they can only be called from static members of the class 
C)  they must be declared as public methods 
D)  they cannot refer to non-static members of the class

Question 4

When an object is passed as an argument, it is actually a reference to the object that is passed.

Accepted Answer

A) True 
 B)False

Question 5

An enumerated data type is actually a special type of class.

Accepted Answer

A) True 
 B)False

Question 6

You can declare an enumerated data type inside of a method.

Accepted Answer

A) True 
 B)False

Question 7

The key word this is the name of a reference variable that an object can use to refer to itself.

Accepted Answer

A) True 
 B)False

Question 8

You cannot use the fully-qualified name of an enum constant for this.

Accepted Answer

A)  a switch expression 
B)  an argument to a method 
C)  a case expression 
D)  all of these 
A)  a switch expression 
B)  an argument to a method 
C)  a case expression 
D)  all of these

Question 9

A deep copy of an object:

Accepted Answer

A)  is an assignment of that object to another object 
B)  is an operation that copies an aggregate object, and all the objects it references 
C)  is a bogus term, it has no meaning 
D)  is always a private method 
A)  is an assignment of that object to another object 
B)  is an operation that copies an aggregate object, and all the objects it references 
C)  is a bogus term, it has no meaning 
D)  is always a private method

Question 10

The term for the relationship created by object aggregation is:

Accepted Answer

A)  has a 
B)  is a 
C)  Sub-class object 
D)  Inner class 
A)  has a 
B)  is a 
C)  Sub-class object 
D)  Inner class

Question 11

If the following is from the method section of a UML diagram, which of the following statements is TRUE?
+ add(object2:Stock): Stock

Accepted Answer

A)  This is a private method named add that accepts and returns objects of the Stock class. 
B)  This is a private method named Stock that adds two objects. 
C)  This is a public method named add that accepts and returns references to objects in the Stock class. 
D)  This is a public method named Stock that adds two objects. 
A)  This is a private method named add that accepts and returns objects of the Stock class. 
B)  This is a private method named Stock that adds two objects. 
C)  This is a public method named add that accepts and returns references to objects in the Stock class. 
D)  This is a public method named Stock that adds two objects.

Question 12

Both instance fields and instance methods are associated with a specific instance of a class, and they cannot be used until an instance of the class is created.

Accepted Answer

A) True 
 B)False

Question 13

If the following is from the method section of a UML diagram, which of the following statements is TRUE?
+ equals(object2:Stock) : boolean

Accepted Answer

A)  This is a private method that receives two objects from the Stock class and returns a boolean value. 
B)  This is a public method that accepts a Stock object as its argument and returns a boolean value. 
C)  This is a private method that returns a boolean value. 
D)  This is a public method that returns a Stock object. 
A)  This is a private method that receives two objects from the Stock class and returns a boolean value. 
B)  This is a public method that accepts a Stock object as its argument and returns a boolean value. 
C)  This is a private method that returns a boolean value. 
D)  This is a public method that returns a Stock object.

Question 14

If you attempt to perform an operation with a null reference variable:

Accepted Answer

A)  the resulting operation will always be zero 
B)  the results will be unpredictable 
C)  the program will terminate 
D)  Java will create an object to reference the variable 
A)  the resulting operation will always be zero 
B)  the results will be unpredictable 
C)  the program will terminate 
D)  Java will create an object to reference the variable

Question 15

When an object reference is passed to a method, the method may change the values in the object.

Accepted Answer

A) True 
 B)False

Question 16

Assuming the following declaration exists: enum Tree { OAK, MAPLE, PINE }
What will the following code display?
System.out.println(Tree.OAK);

Accepted Answer

A)  Tree.OAK 
B)  0 
C)  1 
D)  OAK 
E)  Nothing. This statement will cause an error. 
A)  Tree.OAK 
B)  0 
C)  1 
D)  OAK 
E)  Nothing. This statement will cause an error.

Question 17

What will be returned from a method, if the following is the method header?
Public Rectangle getRectangle()

Accepted Answer

A)  An object of the class Rectangle 
B)  The address of an object of the class Rectangle 
C)  The values stored in the data members of the Rectangle object the method changed 
D)  A graph of a rectangle 
A)  An object of the class Rectangle 
B)  The address of an object of the class Rectangle 
C)  The values stored in the data members of the Rectangle object the method changed 
D)  A graph of a rectangle

Question 18

If a class has a method named finalize, it is called automatically just before a data member that has been identified as final of the class is destroyed by the garbage collector.

Accepted Answer

A) True 
 B)False

Question 19

The this key word is the name of a reference variable that is available to all static methods.

Accepted Answer

A) True 
 B)False

Question 20

Assume the class BankAccount has been created, and the following statement correctly creates an instance of the class: BankAccount account = new BankAccount(5000.0);
What is TRUE about the following statement?
System.out.println(account);

Accepted Answer

A)  The method will display unreadable binary data on the screen. 
B)  A compiler error will occur. 
C)  The account object's toString method will be implicitly called. 
D)  A runtime error will occur. 
A)  The method will display unreadable binary data on the screen. 
B)  A compiler error will occur. 
C)  The account object's toString method will be implicitly called. 
D)  A runtime error will occur.

You cannot use the == operator to compare the contents of:

An instance of a class does not have to exist in order for values to be stored in a class's static fields.

The only limitation that static methods have is:

When an object is passed as an argument, it is actually a reference to the object that is passed.

An enumerated data type is actually a special type of class.

You can declare an enumerated data type inside of a method.

The key word this is the name of a reference variable that an object can use to refer to itself.

You cannot use the fully-qualified name of an enum constant for this.

A deep copy of an object:

The term for the relationship created by object aggregation is:

If the following is from the method section of a UML diagram, which of the following statements is TRUE? + add(object2:Stock): Stock

Both instance fields and instance methods are associated with a specific instance of a class, and they cannot be used until an instance of the class is created.

If the following is from the method section of a UML diagram, which of the following statements is TRUE? + equals(object2:Stock) : boolean

If you attempt to perform an operation with a null reference variable:

When an object reference is passed to a method, the method may change the values in the object.

Assuming the following declaration exists: enum Tree { OAK, MAPLE, PINE } What will the following code display? System.out.println(Tree.OAK);

What will be returned from a method, if the following is the method header? Public Rectangle getRectangle()

If a class has a method named finalize, it is called automatically just before a data member that has been identified as final of the class is destroyed by the garbage collector.

The this key word is the name of a reference variable that is available to all static methods.

Assume the class BankAccount has been created, and the following statement correctly creates an instance of the class: BankAccount account = new BankAccount(5000.0); What is TRUE about the following statement? System.out.println(account);

Introduction to Computers and Java

Java Fundamentals

Decision Structures

Loops and Files

Methods

A First Look at Classes

Arrays and the Arraylist Class

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 8: A Second Look at Classes and Objects

You cannot use the == operator to compare the contents of:

An instance of a class does not have to exist in order for values to be stored in a class's static fields.

The only limitation that static methods have is:

When an object is passed as an argument, it is actually a reference to the object that is passed.

An enumerated data type is actually a special type of class.

You can declare an enumerated data type inside of a method.

The key word this is the name of a reference variable that an object can use to refer to itself.

You cannot use the fully-qualified name of an enum constant for this.

A deep copy of an object:

The term for the relationship created by object aggregation is:

If the following is from the method section of a UML diagram, which of the following statements is TRUE? + add(object2:Stock): Stock

Both instance fields and instance methods are associated with a specific instance of a class, and they cannot be used until an instance of the class is created.

If the following is from the method section of a UML diagram, which of the following statements is TRUE? + equals(object2:Stock) : boolean

If you attempt to perform an operation with a null reference variable:

When an object reference is passed to a method, the method may change the values in the object.

Assuming the following declaration exists: enum Tree { OAK, MAPLE, PINE } What will the following code display? System.out.println(Tree.OAK);

What will be returned from a method, if the following is the method header? Public Rectangle getRectangle()

If a class has a method named finalize, it is called automatically just before a data member that has been identified as final of the class is destroyed by the garbage collector.

The this key word is the name of a reference variable that is available to all static methods.

Assume the class BankAccount has been created, and the following statement correctly creates an instance of the class: BankAccount account = new BankAccount(5000.0); What is TRUE about the following statement? System.out.println(account);

Introduction to Computers and Java

Java Fundamentals

Decision Structures

Loops and Files

Methods

A First Look at Classes

Arrays and the Arraylist Class

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