Problem Solving with Java Exam Practice Tests
Course Introduction
Problem Solving with Java is a foundational course designed to introduce students to the principles of computational thinking and algorithmic problem solving using the Java programming language. The course covers fundamental concepts such as data types, control structures, methods, arrays, and object-oriented programming. Through a combination of theoretical instruction and practical, hands-on exercises, students learn to break down complex problems, design efficient solutions, and implement them in Java. Emphasis is placed on developing logical reasoning, debugging skills, and writing clear, maintainable code, preparing students for further study in computer science and software development.
Recommended Textbook
Starting Out with Java Early Objects 5th Edition by Tony Gaddis
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16 Chapters
620 Verified Questions
620 Flashcards
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Chapter 1: Introduction to Computers and Java
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Sample Questions
Q1) Byte code instructions are
A) machine code instructions.
B) syntax errors.
C) read and interpreted by the JVM.
D) another name for source code.
Answer: C
Q2) A procedure is a set of programming language statements that, together, perform a specific task.
A)True
B)False
Answer: True
Q3) The data contained in an object is known as A) methods.
B) attributes.
C) classes.
D) fields.
Answer: B
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Chapter 2: Java Fundamentals
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Sample Questions
Q1) A Java program must have at least one A) comment.
B) System.out.println(); statement.
C) class definition.
D) variable declaration.
Answer: C
Q2) Which of the following is not a rule that must be followed when naming identifiers?
A) After the first character, you may use the letters a-z, A-Z, an underscore, a dollar sign, or digits 0-9.
B) Identifiers can contain spaces.
C) Uppercase and lowercase characters are distinct.
D) The first character must be one of the letters a-z, A-Z, an underscore or a dollar sign.
Answer: B
Q3) A variable's scope is the part of the program that has access to the variable.
A)True
B)False
Answer: True
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Chapter 3: A First Look at Classes and Objects
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Sample Questions
Q1) A constructor is a method that
A) returns an object of the class.
B) never receives any arguments.
C) performs initialization or setup operations.
D) removes the object from memory.
Answer: C
Q2) The java.lang package is automatically imported into all Java programs.
A)True
B)False
Answer: True
Q3) A method
A) may have zero or more parameter variables.
B) never has parameter variables.
C) must have at least two parameter variables.
D) may have only one parameter variables.
Answer: A
Q4) An access specifier indicates how the class may be accessed.
A)True
B)False
Answer: True
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Chapter 4: Decision Structures
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Sample Questions
Q1) Which of the following strings could be passed to the DecimalFormat constructor to display 12.78 as 012.8?
A) "###.#"
B) "000.0"
C) "##0.0%"
D) "$#0.00"
Q2) The ________ statement is used to create a decision structure, which allows a program to have more than one path of execution.
A) block
B) if
C) null
D) flag
Q3) When testing for character values, the switch statement does not test for the case of the character.
A)True
B)False
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Chapter 5: Loops and Files
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Sample Questions
Q1) Assume that inputFile references a Scanner object that was used to open a file. Which of the following while loops shows the correct way to read data from the file until the end of the file is reached?
A) while (inputFile.nextLine == " ")
B) while (inputFile != null)
C) while (!inputFile.EOF)
D) while (inputFile.hasNext())
Q2) In all but rare cases, loops must contain within themselves
A) nested loops.
B) a way to terminate.
C) arithmetic operators.
D) if statements.
Q3) A loop that executes as long as a particular condition exists is called a(n) ________ loop.
A) infinite
B) count-controlled
C) conditional
D) relational
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Chapter 6: A Second Look at Classes and Objects
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Sample Questions
Q1) CRC stands for
A) Class, Recyclability, Collaborations.
B) Class, Redundancy, Collections.
C) Class, Responsibilities, Collaborations.
D) Code, Reuse, Constancy.
Q2) You can declare an enumerated data type inside of a method.
A)True
B)False
Q3) When you make a copy of the aggregate object and of the objects it references,
A) you are performing a shallow copy.
B) you are performing a nested copy.
C) you are performing a deep copy.
D) a compiler error will occur.
Q4) An instance of a class does not have to exist in order for values to be stored in a class's static fields.
A)True
B)False
Q5) An enumerated data type is actually a special type of class.
A)True
B)False
8
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Chapter 7: Arrays and the ArrayList Class
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Sample Questions
Q1) What will be the result of executing the following code?
Int[] x = {0, 1, 2, 3, 4, 5};
A) An array of 6 values, all initialized to 0 and referenced by the variable x, will be created.
B) An array of 6 values, ranging from 0 through 5 and referenced by the variable x, will be created.
C) The variable x will contain the values 0 through 5.
D) A compiler error will occur.
Q2) The binary search algorithm
A) is less efficient than the sequential search algorithm.
B) will cut the portion of the array being searched in half each it fails to locate the search value.
C) will have a maximum number of comparisons equal to the number of elements in the array.
D) will have an average number of comparisons that is half the number of elements in the array.
Q3) Java does not limit the number of dimensions that an array may have.
A)True
B)False
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Page 9
Chapter 8: Text Processing and Wrapper Classes
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Sample Questions
Q1) A wrapper class is a class that is "wrapped around" a primitive data type and allows you to create objects instead of variables.
A)True
B)False
Q2) Which of the following statements is not true about the following code?
StringBuilder strb = New StringBuilder("Total number of parts: "); Strb.insert(23, 32);
A) The starting position for the insert is 23.
B) strb is a StringBuilder type object.
C) The ending position for the insert is 32.
D) The literal number 32 will be inserted into the string.
Q3) Which of the following import statements is required to use the StringTokenizer class?
A) import java.util.Scanner
B) import java.text.DecimalFormat; C) import java.util.StringTokenizer; D) import javax.swing.JOptionPane;
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Chapter 9: Inheritance
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Sample Questions
Q1) All fields declared in an interface
A) have protected access.
B) must be initialized in the class implementing the interface.
C) have private access.
D) are treated as final and static.
Q2) All methods specified by an interface are
A) private.
B) public.
C) protected.
D) static.
Q3) Which of the following statements correctly specifies two interfaces?
A) public class ClassA implements [Interface1, Interface2]
B) public class ClassA implements (Interface1, Interface2)
C) public class ClassA implements Interface1 | Interface2
D) public class ClassA implements Interface1, Interface2
Q4) In an inheritance relationship, the subclass constructor always executes before the superclass constructor.
A)True
B)False
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Chapter 10: Exceptions and Advanced File I/O
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Sample Questions
Q1) The call stack is an internal list of all the methods that are currently executing.
A)True
B)False
Q2) In order for an object to be serialized, the class must implement this interface.
A) Serial
B) Serializable
C) ObjectOutputStream
D) Writable
Q3) An exception object's default error message can be retrieved using this method.
A) getMessage
B) getDefaultMessage
C) getDefaultErrorMessage
D) getErrorMessage
Q4) When an exception is thrown,
A) it must always be handled by the method that throws it.
B) it must be handled by the program or by the default exception handler.
C) it may be ignored.
D) the program terminates even if the exception is handled.
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Chapter 11: GUI Applications Part 1
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Sample Questions
Q1) When used as an exit code, this value traditionally indicates that the program ended successfully.
A) -1
B) null
C) 0
D) 1
Q2) Very few of the Swing components are coupled with peers, so they are called ________ components.
A) peerless
B) fixed
C) singular
D) lightweight
Q3) To end an application, you pass this as the argument to the JFrame class's setDefaultCloseOperation method.
A) JFrame.CLOSE_NOT_HIDE
B) JFrame.END_ON_CLOSE
C) END_ON_CLOSE
D) JFrame.EXIT_ON_CLOSE
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Chapter 12: GUI Applications Part 2
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Sample Questions
Q1) The JList and JTextArea components do not automatically display scroll bars.
A)True
B)False
Q2) What does the following statement do?
JTextArea textField = JTextArea(message, 25, 15);
A) It creates a text area with 25 rows and 15 columns that will initially display the text "message."
B) It creates a text area with 25 columns and 15 rows that will initially display the text stored in the String object referenced by message.
C) It creates a text area with 25 columns and 15 rows that will initially display the text stored in the JTextArea object referenced by textField.
D) It creates a text area with 25 rows and 15 columns that will initially display the text stored in the String object referenced by message.
Q3) The Dimension class is part of the ________ package.
A) java.awt.menu
B) javax.swing.event
C) javax.swing
D) java.awt
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Chapter 13: Applets and More
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Sample Questions
Q1) If you want to make sure that an applet is compatible with all Java-enabled browsers, use AWT components instead of Swing.
A)True
B)False
Q2) For all Swing components except JApplet and JFrame, you should override this method to get a reference to the component's Graphics object.
A) paintComponent
B) paint
C) paintBase
D) repaint
Q3) An applet does not have to be on a Web server in order to be executed.
A)True
B)False
Q4) An HTML document is usually saved with this file name extension.
A) .xml
B) .html
C) .asp
D) .cfm
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Chapter 14: Creating GUI Applications with JavaFX
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Sample Questions
Q1) A window in a GUI commonly consists of several ________ that present data to the user and/or allow interaction with the application.
A) modules
B) components
C) elements
D) buttons
Q2) In the controller class, you can use the CheckBox's ________ method to determine whether the CheckBox is selected or not.
A) getIndex
B) isActive
C) isChecked
D) isSelected
Q3) Because only one RadioButton in a toggle group can be selected at any given time, the buttons are said to be this.
A) static components
B) singularly bound
C) all inclusive
D) mutually exclusive
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Chapter 15: Recursion
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Sample Questions
Q1) In the ________, we must always reduce the problem to a smaller version of the original problem.
A) base case
B) partition case
C) lessening case
D) recursive case
Q2) A recursive method can have no more than one base case.
A)True
B)False
Q3) This occurs when method A calls method B, which in turn calls method A.
A) dynamic recursion
B) linear recursion
C) direct recursion
D) indirect recursion
Q4) A method is called from the main method for the first time. It then calls itself seven times. What is the depth of recursion?
A) 1
B) 7
C) 8
D) 6
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Chapter 16: Databases
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Sample Questions
Q1) A qualified column name takes the following form:
A) ColumnName.TableName
B) TableName.ColumnName
C) RowName.TableName
D) DatabaseURL.ColumnName
Q2) What will happen if you try to store duplicate data in a primary key column?
A) The column is duplicated.
B) An error will occur.
C) The duplicate data will have concurrency issues.
D) The primary key column will not display the duplicate data.
Q3) In an entity relationship diagram, the primary keys are denoted with A) (PK).
B) (1).
C) (KEY).
D) (PRIME).
Q4) In SQL, the REFERENCES qualifier ensures referential integrity between tables. A)True
B)False
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