Question 1

Which of the following is false?

Accepted Answer

A) Method finalize does not take parameters and has return type void. 
B) Memory leaks using Java are rare because of automatic garbage collection. 
C) Objects are marked for garbage collection by method finalize. 
D) The garbage collector reclaims unused memory. 
A) Method finalize does not take parameters and has return type void. 
B) Memory leaks using Java are rare because of automatic garbage collection. 
C) Objects are marked for garbage collection by method finalize. 
D) The garbage collector reclaims unused memory.

Question 2

Which syntax imports all static members of class Math?

Accepted Answer

A) static import java.lang.Math.*. 
B) import static java.lang.Math.*. 
C) static import java.lang.Math. 
D) import static java.lang.Math. 
A) static import java.lang.Math.*. 
B) import static java.lang.Math.*. 
C) static import java.lang.Math. 
D) import static java.lang.Math.

Question 3

A constructor cannot:

Accepted Answer

A) be overloaded. 
B) initialize variables to their defaults. 
C) specify return types or return values. 
D) have the same name as the class. 
A) be overloaded. 
B) initialize variables to their defaults. 
C) specify return types or return values. 
D) have the same name as the class.

Question 4

A package is:

Accepted Answer

A) A directory structure used to organize classes and interfaces. 
B) A mechanism for software reuse. 
C) A group of related classes and interfaces. 
D) All of the above. 
A) A directory structure used to organize classes and interfaces. 
B) A mechanism for software reuse. 
C) A group of related classes and interfaces. 
D) All of the above.

Question 5

When implementing a method,use the class's set and get methods to access the class's ________ data.

Accepted Answer

A) public. 
B) private. 
C) protected. 
D) All of the above. 
A) public. 
B) private. 
C) protected. 
D) All of the above.

Question 6

Composition is sometimes referred to as a(n)________.

Accepted Answer

A) is-a relationship. 
B) has-a relationship. 
C) many-in-one relationship. 
D) one-to-many relationship. 
A) is-a relationship. 
B) has-a relationship. 
C) many-in-one relationship. 
D) one-to-many relationship.

Question 7

Which statement is false?

Accepted Answer

A) An enum declaration is a comma-separated list of enum constants and may optionally include other components of traditional classes,such as constructors,fields and methods. 
B) Any attempt to create an object of an enum type with operator new results in a compilation error. 
C) An enum constructor cannot be overloaded. 
D) An enum constructor can specify any number of parameters. 
A) An enum declaration is a comma-separated list of enum constants and may optionally include other components of traditional classes,such as constructors,fields and methods. 
B) Any attempt to create an object of an enum type with operator new results in a compilation error. 
C) An enum constructor cannot be overloaded. 
D) An enum constructor can specify any number of parameters.

Question 8

What happens when this is used in a constructor's body to call another constructor of the same class if that call is not the first statement in the constructor?

Accepted Answer

A) A compilation error occurs. 
B) A runtime error occurs. 
C) A logic error occurs. 
D) Nothing happens.The program compiles and runs. 
A) A compilation error occurs. 
B) A runtime error occurs. 
C) A logic error occurs. 
D) Nothing happens.The program compiles and runs.

Question 9

The static method ________ of class String returns a formatted String.

Accepted Answer

A) printf. 
B) format. 
C) formatString. 
D) toFormatString. 
A) printf. 
B) format. 
C) formatString. 
D) toFormatString.

Question 10

Which of the following should usually be private?

Accepted Answer

A) Methods. 
B) Constructors. 
C) Variables (or fields). 
D) All of the above. 
A) Methods. 
B) Constructors. 
C) Variables (or fields). 
D) All of the above.

Question 11

Which of the following statements is true?

Accepted Answer

A) Methods and instance variables can both be either public or private. 
B) Information hiding is achieved by restricting access to class members via keyword public. 
C) The private members of a class are directly accessible to the client of a class. 
D) None of the above is true. 
A) Methods and instance variables can both be either public or private. 
B) Information hiding is achieved by restricting access to class members via keyword public. 
C) The private members of a class are directly accessible to the client of a class. 
D) None of the above is true.

Exam 8: Classes and Objects: a Deeper Look

Which of the following is false?

Which syntax imports all static members of class Math?

A constructor cannot:

A package is:

When implementing a method,use the class's set and get methods to access the class's ________ data.

Composition is sometimes referred to as a(n)________.

Which statement is false?

What happens when this is used in a constructor's body to call another constructor of the same class if that call is not the first statement in the constructor?

The static method ________ of class String returns a formatted String.

Which of the following should usually be private?

Which of the following statements is true?

Introduction to Computers and Java

Introduction to Java Applications

Introduction to Classes and Objects

Control Statements: Part 1

Control Statements: Part 2

Methods: a Deeper Look

Arrays and Arraylists

Object Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

Exception Handling

Atm Case Study,part 1: Object-Oriented Design With the Uml

Atm Case Study,part 2: Implementing an Object-Oriented Design

Gui Components: Part 1

Graphics and Java 2d

Strings

Files,streams and Object Serialization

Recursion

Searching, Sorting and Big O

Generic Collections

Generic Classes and Methods

Custom Generic Data Structures

Applets and Java Web Start

Multimedia: Applets and Applications

Gui, Part 2

Multithreading

Networking

Accessing Databases With Jdbc

Java Server Faces Web Applications

Ajax-Enabled Jsf Web Applications

Web Services

Filters