Application Development with Java Exam Solutions
Course Introduction
This course provides students with a comprehensive introduction to application development using Java. Emphasizing object-oriented programming principles, students will learn to design, implement, test, and deploy Java applications. Topics include Java syntax, data structures, graphical user interfaces, event-driven programming, exception handling, file I/O, and multithreading. By engaging in hands-on projects and practical exercises, students will gain the skills necessary to build robust and scalable software solutions for real-world scenarios.
Recommended Textbook
Java Programming 7th Edition by Joyce Farrell
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17 Chapters
1208 Verified Questions
1208 Flashcards
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Chapter 1: Creating Java Programs
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68 Verified Questions
68 Flashcards
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Sample Questions
Q1) ____ refers to the hiding of data and methods within an object.
A) Instance
B) Inheritance
C) Passed
D) Encapsulation
Answer: D
Q2) Series of characters that will appear in output exactly as entered
A)literal string
B)high-level programming languages
C)dialog box
D)syntax
E)whitespace
F)compiler
G)attributes
H)Machine language
I)Java virtual machine (JVM)
Answer: A
Q3) A(n) ____________________ error occurs when the syntax of the program is correct and the program compiles but produces incorrect results when you execute it.
Answer: logic
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Chapter 2: Using Data
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74 Flashcards
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Sample Questions
Q1) In Java, you use variables of type ____ to store integers, or whole numbers. A) num
B) double C) var
D) int
Answer: D
Q2) public class YourGrade { public static void main(String[] args) { int projectPoints = 89; System.out.print("Your grade for this class is "); System.out.print(projectPoints); System.out.println("%"); } }
Given the above code, what will be the output at the command prompt?
Answer: Output will be as follows: Your grade for this class is 89% A blank line will follow the output.
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Page 4
Chapter 3: Using Methods, Classes, and Objects
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68 Flashcards
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Sample Questions
Q1) A(n) ____________________ is a number appended to a field, typically an ID number or account number.
Answer: check-digit
Q2) What happens to a value returned from a method?
Answer: If a method returns a value, then when you call the method, you normally use the returned value, although you are not required to do so. For example, when you invoke the predictRaise() method, you might want to assign the returned value (also called the method's value) to a double variable named myNewSalary, as in the following statement: myNewSalary = predictRaise(mySalary);. The predictRaise() method returns a double, so it is appropriate to assign the method's returned value to a double variable.
Q3) When creating a method that requires multiple parameters, why would a programmer need to understand a method's signature, and why must a method call match the called method's signature?
Answer: The line of code to call the method would appear as follows: practiceWithCalls();
Q4) An application's main() method must have a void return type.
A)True
B)False
Answer: True
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Chapter 4: More Object Concepts
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Sample Questions
Q1) A disadvantage of Java is the large memory requirements to store a separate copy of each variable and method for each instantiation of a class.
A)True
B)False
Q2) When you write your own constructors, you cannot write versions that receive parameters.
A)True
B)False
Q3) As long as you do not make any ambiguous method calls, a program that contains a potentially ambiguous situation will execute correctly.
A)True
B)False
Q4) ____ involves using one term to indicate diverse meanings, or writing multiple methods with the same name but with different parameter lists.
A) Referencing
B) Overloading
C) Nesting
D) Signing
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Chapter 5: Making Decisions
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70 Flashcards
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Sample Questions
Q1) Explain the difference between a single-alternative if structure and a dual-alternative if structure. When would it be necessary to use a dual-alternative if structure?
Q2) A ____ consists of written steps in diagram form, as a series of shapes connected by arrows.
A) pseudocode chart
B) flowchart
C) sequence structure
D) decision structure
Q3) Create an if else statement that will check if the maxValue variable is equal to 100. If true, create a println statement that will output "Max reached". If false, create a println statement to output "Keep trying".
Q4) Describe how a sequence structure works.
Q5) Why would a programmer execute more than one statement that depends on the evaluation of a Boolean expression, and how could he or she do it in Java?
Q6) You are never required to use a switch structure; you can always achieve the same results with nested ____________________ statements.
Q7) Why would a programmer use an AND operator when using nested if statements?
Page 7
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Chapter 6: Looping
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Sample Questions
Q1) Loop control variables can be evaluated at the start or the end of the loop. Describe both pretest loops and posttest loops. How do do while loops execute?
Q2) Part of the Thread class in the java.lang package
A)prefix ++
B)block
C)definite loop
D)loop control variable
E)binary operators
F)loop fusion
G)decrementing
H)for loop
I)sleep() method
Q3) Shortcut operators are a programmer's only choice when incrementing or accumulating a variable's value.
A)True
B)False
Q4) How could a programmer identify and escape from an infinite loop?
Q5) How does a for loop work?
Q6) Why would a programmer use curly braces in the body of a do while loop?
Page 8
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Chapter 7: Characters, Strings, and the Stringbuilder
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73 Verified Questions
73 Flashcards
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Sample Questions
Q1) The ____ method takes a String argument and returns its double value.
A) parseString()
B) parseInt()
C) parseDouble()
D) returnDouble()
Q2) The String class ____ method evaluates the contents of two String objects to determine if they are equivalent.
A) equals()
B) toString()
C) charAt()
D) replace()
Q3) String firstCompare = "Oak Maple Pine"
String secondCompare = "spruce maple elm" firstCompare.regionMatches(false, 4, secondCompare, 7, 5)
Using the above code, what will be the Boolean value after execution of the regionMatches statement? Explain how the Strings are compared using the regionMatches() method.
Q4) What is the purpose of the replace() method? Provide an example.
Q5) What is the purpose of the substring() method and how do you use it?
Q6) Explain what is needed to declare a String variable and provide an example.
Page 9
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Chapter 8: Arrays
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Sample Questions
Q1) When working with arrays, why is it beneficial to use a loop with a declared symbolic constant equal to the size of the array?
Q2) double[] studentScores; double studentScores[]; Are both of the above statements valid for declaring an array variable? Why or why not?
Q3) When you want to determine whether a variable holds one of many valid values, one option is to use a do while loop to compare the variable to a series of valid values. A)True B)False
Q4) In Java, the size of an array ____ declared immediately following the array name. A) can be B) is always C) is never D) should be
Q5) Describe a situation in which storing just one value at a time in memory does not meet your needs.
Q6) How can you use the enhanced for loop?
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Page 10
Chapter 9: Advanced Array Concepts
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Sample Questions
Q1) import javax.swing.*; class FindPoints
{ public static void main(String[] args)
{ int[][] points = {{ 10, 20, 30}, {20, 40, 60}, {40, 60, 80}}; String prompt; int class; int level; prompt = JOptionPane.showInputDialog(null, "Class: "); class = Integer.parseInt(prompt); prompt = JOptionPane.showInputDialog(null,
Q2) When working with two-dimensional arrays, the length field holds the number of rows in an array and each row has a length field that holds the number of columns in the row.
A)True
B)False
Q3) What are some of the advantages of the ArrayList class over the Arrays class?
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Chapter 10: Introduction to Inheritance
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Sample Questions
Q1) Inherits from a base class
A)information hiding
B)inheritance
C)super()
D)superclass
E)instanceof
F)virtual method call
G)inlining
H)class diagram
I)derived class
Q2) Makes a program run faster
A)information hiding
B)inheritance
C)super()
D)superclass
E)instanceof F)virtual method call
G)inlining
H)class diagram
I)derived class
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Chapter 11: Advanced Inheritance Concepts
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Sample Questions
Q1) The Object class contains a(n) ____________________ method that takes a single argument, which must be the same type as the type of the invoking object.
Q2) Give an example of how you can create an interface to have a class implement behavior from more than one parent.
Q3) public interface FindTheError
{ void firstMethod(int anIntNum)
{ System.out.println("Did you find the error?"); } }
What is the problem with the above interface? How would you correct the interface?
Q4) Which of the following statements creates an array of three Animal references?
A) Animal[] ref = new Animal(3);
B) Animal[] new = ref Animal[3];
C) Animal[] animalRef = new Animal[3];
D) Animal[] ref = extend Animal[3];
Q5) What is an abstract class? Give an example and explain how it works.
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Chapter 12: Exception Handling
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Sample Questions
Q1) What is a finally block and how would a programmer use it?
Q2) When a program contains multiple catch blocks, how are they handled?
Q3) Object-oriented techniques to manage errors
A)Throwable
B)Exception(String message)
C)exception handling
D)syntactic salt
E)mission critical
F)Exception(Throwable cause)
G)fault-tolerant
H)assert statement
I)try block
Q4) Since variables declared within a try or catch block are local to that block, the variable goes out of scope when the try or catch block ends.
A)True
B)False
Q5) If you create an object using Java's BigDecimal class, and then perform a division that results in a non-terminating decimal division such as 1/3, but specify that an exact result is needed, a(n) ____________________ is thrown.
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Chapter 13: File Input and Output
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Sample Questions
Q1) The String class ____ method accepts an argument that identifies the field delimiter and returns an array of Strings.
A) tokens()
B) divide()
C) tokenize()
D) split()
Q2) Writes text to an output stream, buffering the characters
A)batch processing
B)root
C)buffer
D)flushing
E)stream
F)System.getProperty("line.separator")
G)data file
H)close the files
I)BufferedWriter
Q3) A(n) ____________________ object is an avenue for reading and writing a file.
Q4) Briefly describe the Path class in Java.
Q5) A(n) ____________________ is a collection of fields that contain data about an entity.
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Chapter 14: Introduction to Swing Components
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Sample Questions
Q1) Each Swing component is a descendant of a JComponent.
A)True
B)False
Q2) You can call a JFrame's setDefaultCloseOperation() method and use ____ as an argument to keep the JFrame visible and continue running the program.
A) JFrame.EXIT_ON_CLOSE
B) WindowConstants.DISPOSE_ON_CLOSE
C) WindowConstants.DO_NOTHING_ON_CLOSE
D) WindowConstants.HIDE_ON_CLOSE
Q3) You define the text to be displayed in a tool tip by using the setToolTipText() method and passing an appropriate ____ to it.
A) Integer
B) Date
C) String
D) Boolean
Q4) What are some of the decisions you must make when extending a JFrame?
Q5) Swing components are UI elements such as dialog boxes and buttons. You can usually recognize their names because they begin with the letter
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Chapter 15: Advanced Gui Topics
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Sample Questions
Q1) The default size of a component
A)GridBagLayout
B)JScrollPane
C)JPanel
D)glass pane
E)GridLayout
F)action key
G)Color class
H)MouseEvent
I)preferred size
Q2) The parent class for all event objects is named ____, which descends from the Object class.
A) EventObject
B) Event
C) ParentEvent
D) AWTEvent
Q3) Write the statement to create a Color object named myGray with red, green, and blue values of 100 each.
Q4) Describe the difference between an ActionEvent and a MouseEvent.
Q5) What is an adapter class?
17
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Chapter 16: Graphics
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Sample Questions
Q1) You can designate a Graphics color by calling the drawString() method.
A)True
B)False
Q2) BasicStroke myLine = new BasicStroke(12.0f, BasicStroke.CAP_SQUARE, BasicStroke.JOIN_ROUND);
The above statement creates a BasicStroke object and makes it the current stroke. Describe the three arguments that are used in this statement, and then describe the purpose of each.
Q3) A rectangle is drawn with the following statement: tool.drawRect(50, 50, 100, 60); An oval is drawn with the following statement: tool.drawOval(50, 50, 100, 60);
Describe the resulting output, and describe how the four arguments are used to draw the objects.
Q4) Write the statement to create a Rectangle2D.Float object named myRect at 20, 20 with a width of 80 and height of 50.
Q5) Write the statement to create an Arc2D.Float object named myArc at 20, 143, with a width of 50 and a height of 43; with a starting degree of 50, 140 degrees traveled; and using the class variable Arc2D.PIE.
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Chapter 17: Applets, Images, and Sound
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Sample Questions
Q1) Invoking the ____ method after adding one or more JComponents to an applet ensures that the Components draw themselves on the screen.
A) draw()
B) paint()
C) repaint()
D) validate()
Q2) To compile an applet into bytecode, use the ____ command.
A) appletview
B) viewapp
C) javac
D) java
Q3) <html> </object> </html>
In the blank line provided, write the code to run a JApplet named JGreeting that will be 370 pixels wide by 110 pixels tall.
Q4) Describe the two methods for running an applet.
Q5) Briefly describe the image formats that Java supports.
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