Question 1

The String class is a mutable class.

Accepted Answer

A) True 
 B)False  False

Question 2

Converting from a value of primitive type to a corresponding object of its associated wrapper class is called:

Accepted Answer

A) Boxing 
B) Unboxing 
C) Converting 
D) Reinstantiating 
A) Boxing 
B) Unboxing 
C) Converting 
D) Reinstantiating A

Question 3

What is the purpose of Java's wrapper classes?

Accepted Answer

The wrapper classes contain a number of useful constants and static methods.Wrapper classes accomplish two tasks: they produce class objects corresponding to values of primitive types,and they supply useful constants and methods.

Question 4

An example of secondary memory is:

Accepted Answer

A) RAM 
B) ROM 
C) hard disk 
D) all of the above 
A) RAM 
B) ROM 
C) hard disk 
D) all of the above

Question 5

The method trim of the String class trims off:

Accepted Answer

A) Leading white space 
B) Trailing white space 
C) Leading and trailing white space 
D) Blanks 
A) Leading white space 
B) Trailing white space 
C) Leading and trailing white space 
D) Blanks

Question 6

A main method can be placed inside a class definition.

Accepted Answer

A) True 
 B)False

Question 7

Does an object created with a copy constructor reference the same memory location that the original object references? Explain.

Accepted Answer

If properly coded,a copy constructor sho

Question 8

Write a statement that creates and initializes a static variable named salesTax to 7.59.

Accepted Answer

private st

Question 9

Write a statement that creates a constant variable named TAX_RATE.The tax rate is 8.25%.

Accepted Answer

public sta

Question 10

A class invariant is a statement that is always true for every object of the class.

Accepted Answer

A) True 
 B)False

Question 11

All of these are methods of Java's Math class except:

Accepted Answer

A) pow 
B) min 
C) random 
D) toString 
A) pow 
B) min 
C) random 
D) toString

Question 12

To use a package,the program must contain an import statement that names the package.

Accepted Answer

A) True 
 B)False

Question 13

Add accessor and mutator methods to the Book class created in question #13.

Accepted Answer

/** Class for a book with title,author,I

Question 14

To create a package,you must add a package statement at the ____________ of each class file.

Accepted Answer

A) beginning 
B) end 
C) before each method signature 
D) after the import statements 
A) beginning 
B) end 
C) before each method signature 
D) after the import statements

Question 15

Define boxing and unboxing.

Accepted Answer

Boxing and unboxing are terms that refer

Question 16

Explain in detail how main memory works.

Accepted Answer

The main memory is used by the computer

Question 17

Static variables are often used:

Accepted Answer

A) in arithmetic expressions 
B) to communicate between objects 
C) within looping structures 
D) all of the above 
A) in arithmetic expressions 
B) to communicate between objects 
C) within looping structures 
D) all of the above

Question 18

Explain how a package is named in Java.

Accepted Answer

A package name is a form of path name to

Question 19

Wrapper classes provide a class type corresponding to each of the primitive types so that you can have class types that behave somewhat like primitive types.

Accepted Answer

A) True 
 B)False

Question 20

When you use the assignment operator with variables of a class type,you are assigning a:

Accepted Answer

A) value 
B) primitive type 
C) local variable 
D) reference 
A) value 
B) primitive type 
C) local variable 
D) reference

The String class is a mutable class.

Converting from a value of primitive type to a corresponding object of its associated wrapper class is called:

What is the purpose of Java's wrapper classes?

An example of secondary memory is:

The method trim of the String class trims off:

A main method can be placed inside a class definition.

Does an object created with a copy constructor reference the same memory location that the original object references? Explain.

Write a statement that creates and initializes a static variable named salesTax to 7.59.

Write a statement that creates a constant variable named TAX_RATE.The tax rate is 8.25%.

A class invariant is a statement that is always true for every object of the class.

All of these are methods of Java's Math class except:

To use a package,the program must contain an import statement that names the package.

Add accessor and mutator methods to the Book class created in question #13.

To create a package,you must add a package statement at the ____________ of each class file.

Define boxing and unboxing.

Explain in detail how main memory works.

Static variables are often used:

Explain how a package is named in Java.

Wrapper classes provide a class type corresponding to each of the primitive types so that you can have class types that behave somewhat like primitive types.

When you use the assignment operator with variables of a class type,you are assigning a:

Getting Started

Console Input and Output

Flow of Control

Defining Classes I

Arrays

Inheritance

Polymorphism and Abstract Classes

Exception Handling

File IO

Recursion

Uml and Patterns

Interfaces and Inner Classes

Generics and the Arraylist Class

Linked Data Structures

Collections,maps,and Iterators

Swing I

Swing II

Java Never Ends

Applets

Filters

Exam 5: Defining Classes II

The String class is a mutable class.

Converting from a value of primitive type to a corresponding object of its associated wrapper class is called:

What is the purpose of Java's wrapper classes?

An example of secondary memory is:

The method trim of the String class trims off:

A main method can be placed inside a class definition.

Does an object created with a copy constructor reference the same memory location that the original object references? Explain.

Write a statement that creates and initializes a static variable named salesTax to 7.59.

Write a statement that creates a constant variable named TAX_RATE.The tax rate is 8.25%.

A class invariant is a statement that is always true for every object of the class.

All of these are methods of Java's Math class except:

To use a package,the program must contain an import statement that names the package.

Add accessor and mutator methods to the Book class created in question #13.

To create a package,you must add a package statement at the ____________ of each class file.

Define boxing and unboxing.

Explain in detail how main memory works.

Static variables are often used:

Explain how a package is named in Java.

Wrapper classes provide a class type corresponding to each of the primitive types so that you can have class types that behave somewhat like primitive types.

When you use the assignment operator with variables of a class type,you are assigning a:

Getting Started

Console Input and Output

Flow of Control

Defining Classes I

Arrays

Inheritance

Polymorphism and Abstract Classes

Exception Handling

File IO

Recursion

Uml and Patterns

Interfaces and Inner Classes

Generics and the Arraylist Class

Linked Data Structures

Collections,maps,and Iterators

Swing I

Swing II

Java Never Ends

Applets

Filters