Question 1

What is the output of the following code:

Accepted Answer

A) 6 
B) 10 
C) 4 
D) 16 
A) 6 
B) 10 
C) 4 
D) 16 A

Question 2

The type of an object is given by its ______ ?

Accepted Answer

A) variable 
B) method 
C) reference 
D) class 
A) variable 
B) method 
C) reference 
D) class D

Question 3

What is the nickname for the graphical user interface library in Java?

Accepted Answer

A) Applet 
B) GUI 
C) JComponent 
D) Swing 
A) Applet 
B) GUI 
C) JComponent 
D) Swing D

Question 4

Which statement declares a variable that references a Circle of radius 3, assuming the construction parameter is the radius value?

Accepted Answer

A) Circle c = Circle(3) 
B) Circle c = new Circle(3); 
C) Circle c.new.Circle(3); 
D) c.Circle(3); 
A) Circle c = Circle(3) 
B) Circle c = new Circle(3); 
C) Circle c.new.Circle(3); 
D) c.Circle(3);

Question 5

Which statement stores an integer value in a variable?

Accepted Answer

A) count = 5; 
B) count = 5.0; 
C) count == 5; 
D) count != 5; 
A) count = 5; 
B) count = 5.0; 
C) count == 5; 
D) count != 5;

Question 6

What is the name of the = operator in Java?

Accepted Answer

A) inequality 
B) assignment 
C) identity 
D) equality 
A) inequality 
B) assignment 
C) identity 
D) equality

Question 7

In Java, a comment on a line begins with which characters?

Accepted Answer

A) '' 
B) // 
C) () 
D) " " 
A) '' 
B) // 
C) () 
D) " "

Question 8

Which class is part of the java.lang package?

Accepted Answer

A) Rectangle 
B) PrintStream 
C) String 
D) Circle 
A) Rectangle 
B) PrintStream 
C) String 
D) Circle

Question 9

Which of the following declares a variable that will store a welcome message?

Accepted Answer

A) String welcome; 
B) double welcome; 
C) Char welcome; 
D) int welcome; 
A) String welcome; 
B) double welcome; 
C) Char welcome; 
D) int welcome;

Question 10

The Java compiler ignores any text between ____.

Accepted Answer

A) (* and *) 
B) /* and */ 
C) {* and *} 
D) // and // 
A) (* and *) 
B) /* and */ 
C) {* and *} 
D) // and //

Question 11

Which import statement allows for the use of the Rectangle class?

Accepted Answer

A) import java.geom.Rectangle2D; 
B) import java.geom.Rectangle; 
C) import java.geom.RectangularShape; 
D) import java.awt.Rectangle; 
A) import java.geom.Rectangle2D; 
B) import java.geom.Rectangle; 
C) import java.geom.RectangularShape; 
D) import java.awt.Rectangle;

Question 12

Which of the following represents a method call to a method with a void return type?

Accepted Answer

A) greeting.toUpperCase() 
B) System.out.println() 
C) greeting.replace("Hello","World") 
D) greeting.length() 
A) greeting.toUpperCase() 
B) System.out.println() 
C) greeting.replace("Hello","World") 
D) greeting.length()

Question 13

Input to a method, enclosed in parentheses after the method name, is known as ______________.

Accepted Answer

A) implicit parameters 
B) interfaces 
C) arguments 
D) return values 
A) implicit parameters 
B) interfaces 
C) arguments 
D) return values

Question 14

To use a class in another package you need to ________ it.

Accepted Answer

A) export 
B) overload 
C) rewrite 
D) import 
A) export 
B) overload 
C) rewrite 
D) import

Question 15

What is the declared return type for a method that does not have a return value?

Accepted Answer

A) String 
B) There is no declared return type when a method does not return a value. 
C) void 
D) A method must return a value. 
A) String 
B) There is no declared return type when a method does not return a value. 
C) void 
D) A method must return a value.

Question 16

"System.out" is an example of which class?

Accepted Answer

A) String 
B) Println 
C) System 
D) PrintStream 
A) String 
B) Println 
C) System 
D) PrintStream

Question 17

Based on the following statement, which of the following statements sets the title of the frame:
JFrame frame = new JFrame();

Accepted Answer

A) frame.title = "An Empty Frame"; 
B) frame.setTitle(JFrame.EMPTY); 
C) frame.addTitle("An Empty Frame"); 
D) frame.setTitle("An Empty Frame"); 
A) frame.title = "An Empty Frame"; 
B) frame.setTitle(JFrame.EMPTY); 
C) frame.addTitle("An Empty Frame"); 
D) frame.setTitle("An Empty Frame");

Question 18

Which method call represents the invocation of a method that does not have arguments?

Accepted Answer

A) greeting.replace("Hello", "Welcome"); 
B) greeting.length 
C) greeting.length() 
D) System.out.println(greeting); 
A) greeting.replace("Hello", "Welcome"); 
B) greeting.length 
C) greeting.length() 
D) System.out.println(greeting);

Question 19

Which operator constructs object instances?

Accepted Answer

A) new 
B) instanceof 
C) void 
D) construct 
A) new 
B) instanceof 
C) void 
D) construct

Question 20

Assume that the variable count has been declared as type int.Which statement adds 10 to count?

Accepted Answer

A) count = 10; 
B) count == count + 10; 
C) count = count + 10; 
D) count + 10; 
A) count = 10; 
B) count == count + 10; 
C) count = count + 10; 
D) count + 10;

Exam 2: Using Objects

What is the output of the following code:

The type of an object is given by its ______ ?

What is the nickname for the graphical user interface library in Java?

Which statement declares a variable that references a Circle of radius 3, assuming the construction parameter is the radius value?

Which statement stores an integer value in a variable?

What is the name of the = operator in Java?

In Java, a comment on a line begins with which characters?

Which class is part of the java.lang package?

Which of the following declares a variable that will store a welcome message?

The Java compiler ignores any text between ____.

Which import statement allows for the use of the Rectangle class?

Which of the following represents a method call to a method with a void return type?

Input to a method, enclosed in parentheses after the method name, is known as ______________.

To use a class in another package you need to ________ it.

What is the declared return type for a method that does not have a return value?

"System.out" is an example of which class?

Based on the following statement, which of the following statements sets the title of the frame: JFrame frame = new JFrame();

Which method call represents the invocation of a method that does not have arguments?

Which operator constructs object instances?

Assume that the variable count has been declared as type int.Which statement adds 10 to count?

Introduction

Implementing Classes

Fundamental Data Types

Decisions

Loops

Arrays and Array Lists

Designing Classes

Inheritance

Interfaces

Input/Output and Exception Handling

Object-Oriented Design

Recursion

Sorting and Searching

The Java Collections Framework

Basic Data Structures

Tree Structures

Generic Classes

Stream Processing

Graphical User Interfaces

Advanced Input/Output

Multithreading

Internet Networking

Relational Databases

XML

Filters