,TESTBANK FOR Java How to Program An Objects-
Natural Approach, 12th edition Paul Deitel
Notes
1- The file is chapter after chapter.
2- We have shown you few pages sample.
3- The file contains all Appendix and Excel sheet
if it exists.
4- We have all what you need, we make update
at every time. There are many new editions
waiting you.
5- If you think you purchased the wrong file You
can contact us at every time, we can replace it
with true one.
Our email:
,Java How to Program: An Objects-Natural Approach, 12e (Deitel)
Appendix A Introduction to JShell: Java's REPL for Interactive Java
A.1 Introduction
1) What does REPL stand for in the context of JShell?
A) Read-Evaluate-Print-Loop
B) Rapid-Execution-Programming-Language
C) Real-Environment-Processing-Library
D) Runtime-Error-Prevention-Logic
Answer: A
Topic: A.1 Introduction
2) Which of the following best describes JShell's primary purpose?
A) To replace traditional Java IDEs completely
B) To provide a fast and friendly environment for exploring, discovering, and experimenting with Java
C) To compile complete Java applications faster
D) To debug existing Java programs
Answer: B
Topic: A.1 Introduction
3) JShell eliminates the need for which of the following when testing code snippets?
A) Variable declarations
B) Method calls
C) Creating a class containing a main method
D) Import statements
Answer: C
Topic: A.1 Introduction
4) What is auto-completion in JShell?
A) A feature that automatically finishes writing your code based on machine learning predictions
B) A feature that completes names of classes, methods, and variables after you enter a portion of them
C) A feature that automatically creates documentation for your code
D) A feature that automatically creates variable names for you
Answer: B
Topic: A.1 Introduction
1
Copyright © 2025 Pearson Education, Inc.
,A.2 Introduction to JShell
1) What command is used to start a JShell session?
A) java
B) javac
C) jshell
D) jdk
Answer: C
Topic: A.2 Introduction to JShell
2) What does JShell display when you start a new session?
A) Only the jshell> prompt
B) A welcome message, version information, and the jshell> prompt
C) The Java classpath information
D) A list of available commands
Answer: B
Topic: A.2 Introduction to JShell
3) What are the two input types that JShell accepts?
A) Java code snippets and compilation commands
B) Java code snippets and JShell commands
C) Java source files and class files
D) Expressions and statements only
Answer: B
Topic: A.2 Introduction to JShell
4) When entering a standalone statement in JShell, semicolons are:
A) Always required
B) Never allowed
C) Optional - JShell adds them automatically
D) Required only for method declarations
Answer: C
Topic: A.2 Introduction to JShell
5) What is the difference between using System.out.println() and System.out.print() in JShell?
A) println() displays text, while print() only displays numbers.
B) println() adds a newline character after the output, while print() does not.
C) print() adds a newline character after the output, while println() does not.
D) There is no difference between these methods in JShell.
Answer: B
Topic: A.2 Introduction to JShell
6) When you declare an int variable without initialization in JShell, what value does it receive?
A) null
B) 0
C) undefined
D) 1
Answer: B
Topic: A.2 Introduction to JShell
7) What happens when you declare a new variable with the same name as an existing variable in JShell?
A) JShell reports a compilation error.
B) The new declaration is ignored.
C) JShell replaces the first declaration with the new one.
D) Both variables coexist with different scope.
2
Copyright © 2025 Pearson Education, Inc.
,Answer: C
Topic: A.2 Introduction to JShell
8) When JShell displays a variable assignment, what does the notation "==>" mean?
A) Comparison operator
B) Assignment operator
C) "Has the value"
D) Error indicator
Answer: C
Topic: A.2 Introduction to JShell
9) What does the /list command do in JShell?
A) Lists all Java packages available in the current session
B) Lists the valid snippets entered in the current session
C) Lists all the errors encountered in the current session
D) Lists all files in the current directory
Answer: B
Topic: A.2 Introduction to JShell
10) How do you execute a specific snippet by its ID number in JShell?
A) /run id
B) /exec id
C) /id
D) /execute id
Answer: C
Topic: A.2 Introduction to JShell
11) Which command re-executes the previous snippet in JShell?
A) /last
B) /previous
C) /!
D) /back
Answer: C
Topic: A.2 Introduction to JShell
12) When you enter an expression in JShell, it creates an implicit variable named:
A) $temp
B) $var
C) $# (where # is the snippet ID)
D) $result
Answer: C
Topic: A.2 Introduction to JShell
13) What type does JShell infer for the expression "11 + 5"?
A) String
B) double
C) int
D) Object
Answer: C
Topic: A.2 Introduction to JShell
14) Can you use implicitly declared variables (like $10) in subsequent expressions?
A) No, they are read-only
B) Yes, they can be used like any other variable
C) Only in the same line where they were created
3
Copyright © 2025 Pearson Education, Inc.
,D) Only after explicitly declaring them
Answer: B
Topic: A.2 Introduction to JShell
15) How do you view a variable's current value in JShell?
A) Use the /value command.
B) Enter the variable name and press Enter.
C) Use System.out.println() only.
D) Use the /show command.
Answer: B
Topic: A.2 Introduction to JShell
16) Which command removes all prior code from a JShell session?
A) /clear
B) /delete
C) /reset
D) /restart
Answer: C
Topic: A.2 Introduction to JShell
17) What happens when you begin entering a multi-line statement like an if statement in JShell?
A) JShell displays an error message because multi-line statements are not supported.
B) JShell waits until the entire statement is completed before processing it.
C) JShell displays a continuation prompt (...>) and indents the next line.
D) JShell processes each line separately as it's entered.
Answer: C
Topic: A.2 Introduction to JShell
18) What prompt does JShell display when you enter an incomplete multiline statement?
A) jshell>
B) ...>
C) >>
D) >>>
Answer: B
Topic: A.2 Introduction to JShell
4
Copyright © 2025 Pearson Education, Inc.
,19) In a multiline if statement body, are semicolons required?
A) No, JShell adds them automatically
B) Yes, they are required
C) Only for the last statement
D) Only for variable declarations
Answer: B
Topic: A.2 Introduction to JShell
20) How can you edit an existing code snippet in JShell?
A) You must delete and rewrite the snippet.
B) Use the /edit command to open the JShell Edit Pad or a custom editor.
C) Use the /modify command followed by the snippet ID.
D) You cannot edit existing snippets in JShell.
Answer: B
Topic: A.2 Introduction to JShell
21) Which command opens the JShell Edit Pad?
A) /editor
B) /edit
C) /modify
D) /change
Answer: B
Topic: A.2 Introduction to JShell
22) When you edit a snippet in JShell, what happens to the original snippet?
A) It is deleted.
B) It remains unchanged and a new snippet is created.
C) It is overwritten.
D) It is marked as deprecated.
Answer: B
Topic: A.2 Introduction to JShell
23) JShell Edit Pad is:
A) A full-featured IDE
B) A modal window with basic editing capabilities
C) A web-based editor
D) A command-line text editor
Answer: B
Topic: A.2 Introduction to JShell
24) Which command is used to terminate a JShell session?
A) /quit
B) /exit
C) /close
D) Both A and B are correct
Answer: D
Topic: A.2 Introduction to JShell
5
Copyright © 2025 Pearson Education, Inc.
,A.3 Command-Line Input in JShell
1) When using Scanner for input in JShell, where does the input cursor appear?
A) Next to the prompt message
B) Below the jshell> prompt
C) At the top of the screen
D) In a separate input window
Answer: B
Topic: A.3 Command-Line Input in JShell
2) For most JShell experimentation, instead of using Scanner input, you should:
A) Use GUI input dialogs
B) Read from files
C) Use simple variable assignments
D) Use command-line arguments
Answer: C
Topic: A.3 Command-Line Input in JShell
A.4 Declaring and Using Classes
1) When you complete a class declaration in JShell, what message does it display?
A) "class compiled successfully"
B) "created class ClassName"
C) "class ClassName loaded"
D) "new class defined"
Answer: B
Topic: A.4 Declaring and Using Classes
2) Are semicolons required throughout a class body in JShell?
A) No, they are optional everywhere
B) Yes, they are required
C) Only for method declarations
D) Only for variable declarations
Answer: B
Topic: A.4 Declaring and Using Classes
3) What is the default value of a reference-type variable declared in JShell?
A) 0
B) ""
C) null
D) undefined
Answer: C
Topic: A.4 Declaring and Using Classes
6
Copyright © 2025 Pearson Education, Inc.
,4) When you create a new object in JShell, what does the notation after the @ symbol represent?
A) The object's memory address
B) The object's hashcode
C) The object's type
D) The object's size
Answer: B
Topic: A.4 Declaring and Using Classes
5) When you call a void method on an object in JShell, what appears as output?
A) "void"
B) The method name
C) No additional output
D) "method executed"
Answer: C
Topic: A.4 Declaring and Using Classes
6) When you invoke a method that returns a value as part of a larger statement, the return value is:
A) Stored in an implicit variable
B) Used in that statement rather than stored
C) Displayed separately
D) Ignored
Answer: B
Topic: A.4 Declaring and Using Classes
7) What shortcut key combination can you use to create a meaningful variable name for an expression in
JShell?
A) Ctrl+Alt+V
B) Ctrl+Shift+V
C) Alt+V
D) Shift+Alt+V
Answer: A
Topic: A.4 Declaring and Using Classes
8) Which JShell command allows you to save all valid code snippets to a file?
A) /save
B) /write
C) /output
D) /store
Answer: A
Topic: A.4 Declaring and Using Classes
9) Which command loads and executes snippets from a file?
A) /load
B) /import
C) /read
D) /open
Answer: D
Topic: A.4 Declaring and Using Classes
10) Can you use /open to load existing Java source code files?
A) No, only JShell snippet files
B) Yes, it can load any Java source file
C) Only if they contain a main method
D) Only class files, not source files
Answer: B
Topic: A.4 Declaring and Using Classes
7
Copyright © 2025 Pearson Education, Inc.
, A.5 Discovery with JShell Auto-Completion
1) Auto-completion in JShell is triggered by pressing:
A) Space
B) Enter
C) Tab
D) Ctrl
Answer: C
Topic: A.5 Discovery with JShell Auto-Completion
2) JShell auto-completion is:
A) Case-insensitive
B) Case-sensitive
C) Partially case-sensitive
D) Configurable for case sensitivity
Answer: B
Topic: A.5 Discovery with JShell Auto-Completion
3) When JShell displays method names in auto-completion, those followed by "()" are methods that:
A) Require at least one argument
B) Do not require arguments
C) Have syntax errors
D) Are deprecated
Answer: B
Topic: A.5 Discovery with JShell Auto-Completion
4) When you type "/" and press Tab, JShell displays:
A) Only the most common commands
B) Error message
C) The complete list of JShell commands
D) Help documentation
Answer: C
Topic: A.5 Discovery with JShell Auto-Completion
8
Copyright © 2025 Pearson Education, Inc.
Natural Approach, 12th edition Paul Deitel
Notes
1- The file is chapter after chapter.
2- We have shown you few pages sample.
3- The file contains all Appendix and Excel sheet
if it exists.
4- We have all what you need, we make update
at every time. There are many new editions
waiting you.
5- If you think you purchased the wrong file You
can contact us at every time, we can replace it
with true one.
Our email:
,Java How to Program: An Objects-Natural Approach, 12e (Deitel)
Appendix A Introduction to JShell: Java's REPL for Interactive Java
A.1 Introduction
1) What does REPL stand for in the context of JShell?
A) Read-Evaluate-Print-Loop
B) Rapid-Execution-Programming-Language
C) Real-Environment-Processing-Library
D) Runtime-Error-Prevention-Logic
Answer: A
Topic: A.1 Introduction
2) Which of the following best describes JShell's primary purpose?
A) To replace traditional Java IDEs completely
B) To provide a fast and friendly environment for exploring, discovering, and experimenting with Java
C) To compile complete Java applications faster
D) To debug existing Java programs
Answer: B
Topic: A.1 Introduction
3) JShell eliminates the need for which of the following when testing code snippets?
A) Variable declarations
B) Method calls
C) Creating a class containing a main method
D) Import statements
Answer: C
Topic: A.1 Introduction
4) What is auto-completion in JShell?
A) A feature that automatically finishes writing your code based on machine learning predictions
B) A feature that completes names of classes, methods, and variables after you enter a portion of them
C) A feature that automatically creates documentation for your code
D) A feature that automatically creates variable names for you
Answer: B
Topic: A.1 Introduction
1
Copyright © 2025 Pearson Education, Inc.
,A.2 Introduction to JShell
1) What command is used to start a JShell session?
A) java
B) javac
C) jshell
D) jdk
Answer: C
Topic: A.2 Introduction to JShell
2) What does JShell display when you start a new session?
A) Only the jshell> prompt
B) A welcome message, version information, and the jshell> prompt
C) The Java classpath information
D) A list of available commands
Answer: B
Topic: A.2 Introduction to JShell
3) What are the two input types that JShell accepts?
A) Java code snippets and compilation commands
B) Java code snippets and JShell commands
C) Java source files and class files
D) Expressions and statements only
Answer: B
Topic: A.2 Introduction to JShell
4) When entering a standalone statement in JShell, semicolons are:
A) Always required
B) Never allowed
C) Optional - JShell adds them automatically
D) Required only for method declarations
Answer: C
Topic: A.2 Introduction to JShell
5) What is the difference between using System.out.println() and System.out.print() in JShell?
A) println() displays text, while print() only displays numbers.
B) println() adds a newline character after the output, while print() does not.
C) print() adds a newline character after the output, while println() does not.
D) There is no difference between these methods in JShell.
Answer: B
Topic: A.2 Introduction to JShell
6) When you declare an int variable without initialization in JShell, what value does it receive?
A) null
B) 0
C) undefined
D) 1
Answer: B
Topic: A.2 Introduction to JShell
7) What happens when you declare a new variable with the same name as an existing variable in JShell?
A) JShell reports a compilation error.
B) The new declaration is ignored.
C) JShell replaces the first declaration with the new one.
D) Both variables coexist with different scope.
2
Copyright © 2025 Pearson Education, Inc.
,Answer: C
Topic: A.2 Introduction to JShell
8) When JShell displays a variable assignment, what does the notation "==>" mean?
A) Comparison operator
B) Assignment operator
C) "Has the value"
D) Error indicator
Answer: C
Topic: A.2 Introduction to JShell
9) What does the /list command do in JShell?
A) Lists all Java packages available in the current session
B) Lists the valid snippets entered in the current session
C) Lists all the errors encountered in the current session
D) Lists all files in the current directory
Answer: B
Topic: A.2 Introduction to JShell
10) How do you execute a specific snippet by its ID number in JShell?
A) /run id
B) /exec id
C) /id
D) /execute id
Answer: C
Topic: A.2 Introduction to JShell
11) Which command re-executes the previous snippet in JShell?
A) /last
B) /previous
C) /!
D) /back
Answer: C
Topic: A.2 Introduction to JShell
12) When you enter an expression in JShell, it creates an implicit variable named:
A) $temp
B) $var
C) $# (where # is the snippet ID)
D) $result
Answer: C
Topic: A.2 Introduction to JShell
13) What type does JShell infer for the expression "11 + 5"?
A) String
B) double
C) int
D) Object
Answer: C
Topic: A.2 Introduction to JShell
14) Can you use implicitly declared variables (like $10) in subsequent expressions?
A) No, they are read-only
B) Yes, they can be used like any other variable
C) Only in the same line where they were created
3
Copyright © 2025 Pearson Education, Inc.
,D) Only after explicitly declaring them
Answer: B
Topic: A.2 Introduction to JShell
15) How do you view a variable's current value in JShell?
A) Use the /value command.
B) Enter the variable name and press Enter.
C) Use System.out.println() only.
D) Use the /show command.
Answer: B
Topic: A.2 Introduction to JShell
16) Which command removes all prior code from a JShell session?
A) /clear
B) /delete
C) /reset
D) /restart
Answer: C
Topic: A.2 Introduction to JShell
17) What happens when you begin entering a multi-line statement like an if statement in JShell?
A) JShell displays an error message because multi-line statements are not supported.
B) JShell waits until the entire statement is completed before processing it.
C) JShell displays a continuation prompt (...>) and indents the next line.
D) JShell processes each line separately as it's entered.
Answer: C
Topic: A.2 Introduction to JShell
18) What prompt does JShell display when you enter an incomplete multiline statement?
A) jshell>
B) ...>
C) >>
D) >>>
Answer: B
Topic: A.2 Introduction to JShell
4
Copyright © 2025 Pearson Education, Inc.
,19) In a multiline if statement body, are semicolons required?
A) No, JShell adds them automatically
B) Yes, they are required
C) Only for the last statement
D) Only for variable declarations
Answer: B
Topic: A.2 Introduction to JShell
20) How can you edit an existing code snippet in JShell?
A) You must delete and rewrite the snippet.
B) Use the /edit command to open the JShell Edit Pad or a custom editor.
C) Use the /modify command followed by the snippet ID.
D) You cannot edit existing snippets in JShell.
Answer: B
Topic: A.2 Introduction to JShell
21) Which command opens the JShell Edit Pad?
A) /editor
B) /edit
C) /modify
D) /change
Answer: B
Topic: A.2 Introduction to JShell
22) When you edit a snippet in JShell, what happens to the original snippet?
A) It is deleted.
B) It remains unchanged and a new snippet is created.
C) It is overwritten.
D) It is marked as deprecated.
Answer: B
Topic: A.2 Introduction to JShell
23) JShell Edit Pad is:
A) A full-featured IDE
B) A modal window with basic editing capabilities
C) A web-based editor
D) A command-line text editor
Answer: B
Topic: A.2 Introduction to JShell
24) Which command is used to terminate a JShell session?
A) /quit
B) /exit
C) /close
D) Both A and B are correct
Answer: D
Topic: A.2 Introduction to JShell
5
Copyright © 2025 Pearson Education, Inc.
,A.3 Command-Line Input in JShell
1) When using Scanner for input in JShell, where does the input cursor appear?
A) Next to the prompt message
B) Below the jshell> prompt
C) At the top of the screen
D) In a separate input window
Answer: B
Topic: A.3 Command-Line Input in JShell
2) For most JShell experimentation, instead of using Scanner input, you should:
A) Use GUI input dialogs
B) Read from files
C) Use simple variable assignments
D) Use command-line arguments
Answer: C
Topic: A.3 Command-Line Input in JShell
A.4 Declaring and Using Classes
1) When you complete a class declaration in JShell, what message does it display?
A) "class compiled successfully"
B) "created class ClassName"
C) "class ClassName loaded"
D) "new class defined"
Answer: B
Topic: A.4 Declaring and Using Classes
2) Are semicolons required throughout a class body in JShell?
A) No, they are optional everywhere
B) Yes, they are required
C) Only for method declarations
D) Only for variable declarations
Answer: B
Topic: A.4 Declaring and Using Classes
3) What is the default value of a reference-type variable declared in JShell?
A) 0
B) ""
C) null
D) undefined
Answer: C
Topic: A.4 Declaring and Using Classes
6
Copyright © 2025 Pearson Education, Inc.
,4) When you create a new object in JShell, what does the notation after the @ symbol represent?
A) The object's memory address
B) The object's hashcode
C) The object's type
D) The object's size
Answer: B
Topic: A.4 Declaring and Using Classes
5) When you call a void method on an object in JShell, what appears as output?
A) "void"
B) The method name
C) No additional output
D) "method executed"
Answer: C
Topic: A.4 Declaring and Using Classes
6) When you invoke a method that returns a value as part of a larger statement, the return value is:
A) Stored in an implicit variable
B) Used in that statement rather than stored
C) Displayed separately
D) Ignored
Answer: B
Topic: A.4 Declaring and Using Classes
7) What shortcut key combination can you use to create a meaningful variable name for an expression in
JShell?
A) Ctrl+Alt+V
B) Ctrl+Shift+V
C) Alt+V
D) Shift+Alt+V
Answer: A
Topic: A.4 Declaring and Using Classes
8) Which JShell command allows you to save all valid code snippets to a file?
A) /save
B) /write
C) /output
D) /store
Answer: A
Topic: A.4 Declaring and Using Classes
9) Which command loads and executes snippets from a file?
A) /load
B) /import
C) /read
D) /open
Answer: D
Topic: A.4 Declaring and Using Classes
10) Can you use /open to load existing Java source code files?
A) No, only JShell snippet files
B) Yes, it can load any Java source file
C) Only if they contain a main method
D) Only class files, not source files
Answer: B
Topic: A.4 Declaring and Using Classes
7
Copyright © 2025 Pearson Education, Inc.
, A.5 Discovery with JShell Auto-Completion
1) Auto-completion in JShell is triggered by pressing:
A) Space
B) Enter
C) Tab
D) Ctrl
Answer: C
Topic: A.5 Discovery with JShell Auto-Completion
2) JShell auto-completion is:
A) Case-insensitive
B) Case-sensitive
C) Partially case-sensitive
D) Configurable for case sensitivity
Answer: B
Topic: A.5 Discovery with JShell Auto-Completion
3) When JShell displays method names in auto-completion, those followed by "()" are methods that:
A) Require at least one argument
B) Do not require arguments
C) Have syntax errors
D) Are deprecated
Answer: B
Topic: A.5 Discovery with JShell Auto-Completion
4) When you type "/" and press Tab, JShell displays:
A) Only the most common commands
B) Error message
C) The complete list of JShell commands
D) Help documentation
Answer: C
Topic: A.5 Discovery with JShell Auto-Completion
8
Copyright © 2025 Pearson Education, Inc.
