Question 1

To create an app in NetBeans, you must first create a project, i.e., a group of related ________, such as code and images that make up an app.

Accepted Answer

A)  apps 
B)  applications 
C)  controls 
D)  files 
A)  apps 
B)  applications 
C)  controls 
D)  files D

Question 2

Which of the following statements is false?

Accepted Answer

A)  You can set a Button's text by double clicking it, or by selecting the Button, then setting its Text property in the Inspector window's Properties section. 
B)  A GridPane column's contents are left-aligned by default. 
C)  Setting a node's Pref Width property of a GridPane column to USE_COMPUTED_SIZE indicates that the width should be based on the widest child. 
D)  All of the above are true. 
A)  You can set a Button's text by double clicking it, or by selecting the Button, then setting its Text property in the Inspector window's Properties section. 
B)  A GridPane column's contents are left-aligned by default. 
C)  Setting a node's Pref Width property of a GridPane column to USE_COMPUTED_SIZE indicates that the width should be based on the widest child. 
D)  All of the above are true. D

Question 3

The window in which a JavaFX app's GUI is displayed is known as the________.

Accepted Answer

A)  main window 
B)  stage 
C)  podium 
D)  rostrum 
A)  main window 
B)  stage 
C)  podium 
D)  rostrum B

Question 4

To make a layout container the ________ node in a scene graph, select the layout container, then select Scene Builder's Edit > Trim Document to Selection menu item.

Accepted Answer

A)  base 
B)  root 
C)  origin 
D)  start 
A)  base 
B)  root 
C)  origin 
D)  start

Question 5

Which of the following statements is false?

Accepted Answer

A)  JavaFX applications in which the GUI is implemented as FXML adhere to the Model-View-Controller (MV
C)  design pattern, which separates an app's data (contained in the model) from the app's GUI (the view) and the app's processing logic (the controller). 
B)  The model presents the data stored in the view. 
C)  When a user provides input, the controller modifies the model with the given input. 
D)  When the model changes, the controller updates the view to present the changed data. 
A)  JavaFX applications in which the GUI is implemented as FXML adhere to the Model-View-Controller (MV
C)  design pattern, which separates an app's data (contained in the model) from the app's GUI (the view) and the app's processing logic (the controller). 
B)  The model presents the data stored in the view. 
C)  When a user provides input, the controller modifies the model with the given input. 
D)  When the model changes, the controller updates the view to present the changed data.

Question 6

Which of the following statements is false?

Accepted Answer

A)  You can specify the default amount of space between a GridPane's columns and rows with its Hgap (horizontal gap) and Vgap (vertical gap) properties, respectively. 
B)  You can type in a TextField only if it's "in focus"-that is, it's the control that the user is interacting with. 
C)  When you click an interactive control, it prompts for input. 
D)  When you press the Tab key, the focus transfers from the current focusable control to the next one-this occurs in the order the controls were added to the GUI. 
A)  You can specify the default amount of space between a GridPane's columns and rows with its Hgap (horizontal gap) and Vgap (vertical gap) properties, respectively. 
B)  You can type in a TextField only if it's "in focus"-that is, it's the control that the user is interacting with. 
C)  When you click an interactive control, it prompts for input. 
D)  When you press the Tab key, the focus transfers from the current focusable control to the next one-this occurs in the order the controls were added to the GUI.

Question 7

Layout containers help you arrange GUI components. A VBox arranges its nodes________.

Accepted Answer

A)  left to right 
B)  by best fit 
C)  vertically from top to bottom 
D)  None of the above. 
A)  left to right 
B)  by best fit 
C)  vertically from top to bottom 
D)  None of the above.

Question 8

NetBeans creates three files for a JavaFX FXML Application project-an FXML markup file for the GUI, a file containing the app's main class and a file containing the app's ________ class.

Accepted Answer

A)  view 
B)  model 
C)  main 
D)  controller 
A)  view 
B)  model 
C)  main 
D)  controller

Question 9

The space between a node's contents and its top, right, bottom and left edges is known as the ________, which separates the contents from the node's edges.

Accepted Answer

A)  margin 
B)  spacing. 
C)  padding. 
D)  None of the above. 
A)  margin 
B)  spacing. 
C)  padding. 
D)  None of the above.

Question 10

Which of the following statements is false?

Accepted Answer

A)  A JavaFX GUI is defined as a scene graph-a tree structure of an app's visual elements, such as GUI controls, shapes, images, video, text and more. 
B)  Each visual element in the scene graph is a node-an instance of a subclass of Node (package javafx.scene), which defines common attributes and behaviors for all nodes in the scene graph. 
C)  The first node in the scene graph is known as the origin. 
D)  Nodes that have children are typically layout containers that arrange their child nodes in the scene. 
A)  A JavaFX GUI is defined as a scene graph-a tree structure of an app's visual elements, such as GUI controls, shapes, images, video, text and more. 
B)  Each visual element in the scene graph is a node-an instance of a subclass of Node (package javafx.scene), which defines common attributes and behaviors for all nodes in the scene graph. 
C)  The first node in the scene graph is known as the origin. 
D)  Nodes that have children are typically layout containers that arrange their child nodes in the scene.

Question 11

A JavaFX Button's event handler receives a(n) ________, which indicates that the Button was clicked.

Accepted Answer

A)  ButtonEvent 
B)  ObjectEvent 
C)  ControlEvent 
D)  ActionEvent 
A)  ButtonEvent 
B)  ObjectEvent 
C)  ControlEvent 
D)  ActionEvent

Question 12

The NetBeans ________ window provides access to all of your projects. Within a project's node, the contents are organized into folders and files.

Accepted Answer

A)  FXML 
B)  GUI 
C)  Projects 
D)  Root 
A)  FXML 
B)  GUI 
C)  Projects 
D)  Root

Question 13

A JavaFX app's main class directly inherits from ________.

Accepted Answer

A)  Main 
B)  Application 
C)  App 
D)  Object 
A)  Main 
B)  Application 
C)  App 
D)  Object

Question 14

Which of the following statements is false?

Accepted Answer

A)  When the user interacts with a GUI component, the interaction-known as an event-drives the program to perform a task. 
B)  For events that occur when the value of a control's property changes, you must create the event handler entirely using only drag and drop in Scene Builder. 
C)  The code that performs a task in response to an event is called an event handler. 
D)  For certain events you can link a control to its event-handling method by using the Code section of Scene Builder's Inspector window. In this case, the class that implements the event-listener interface will be created for you and will call the method you specify. 
A)  When the user interacts with a GUI component, the interaction-known as an event-drives the program to perform a task. 
B)  For events that occur when the value of a control's property changes, you must create the event handler entirely using only drag and drop in Scene Builder. 
C)  The code that performs a task in response to an event is called an event handler. 
D)  For certain events you can link a control to its event-handling method by using the Code section of Scene Builder's Inspector window. In this case, the class that implements the event-listener interface will be created for you and will call the method you specify.

Question 15

A VBox's ________ determines the layout positioning of its children.

Accepted Answer

A)  margin 
B)  padding 
C)  calibration 
D)  alignment 
A)  margin 
B)  padding 
C)  calibration 
D)  alignment

Question 16

Which of the following statements is false?

Accepted Answer

A)  Each cell in a GridPane can be empty or can hold one or more JavaFX components, including layout containers that arrange other controls. 
B)  Each component in a GridPane can span multiple columns or rows. 
C)  A TextField (package javafx.scene.control) can accept text input or display text. 
D)  A Slider (package javafx.scene.control) represents a value in the range 0.0-1.0 by default and allows the user to select a number in that range by moving the Slider's thumb. 
A)  Each cell in a GridPane can be empty or can hold one or more JavaFX components, including layout containers that arrange other controls. 
B)  Each component in a GridPane can span multiple columns or rows. 
C)  A TextField (package javafx.scene.control) can accept text input or display text. 
D)  A Slider (package javafx.scene.control) represents a value in the range 0.0-1.0 by default and allows the user to select a number in that range by moving the Slider's thumb.

Question 17

Which of the following statements is false?

Accepted Answer

A)  The nodes arranged in a layout container are a combination of controls and possibly other layout containers. 
B)  When the user interacts with a control, it generates an event. Programs can use event handling to specify what should happen when each user interaction occurs. 
C)  An event handler is a method that responds to a user interaction. An FXML GUI's event handlers are defined in a controller class. 
D)  All of the above statements are true. 
A)  The nodes arranged in a layout container are a combination of controls and possibly other layout containers. 
B)  When the user interacts with a control, it generates an event. Programs can use event handling to specify what should happen when each user interaction occurs. 
C)  An event handler is a method that responds to a user interaction. An FXML GUI's event handlers are defined in a controller class. 
D)  All of the above statements are true.

Question 18

Which of the following statements is false?

Accepted Answer

A)  JavaFX Scene Builder is a standalone JavaFX GUI visual layout tool that can also be used with various IDEs. 
B)  JavaFX Scene Builder enables you to create GUIs by dragging and dropping GUI components from Scene Builder's library onto a design area, then modifying and styling the GUI-all without writing any code. 
C)  The FXML code is integrated with the program logic that's defined in Java source code-this integration of the interface (the GUI) with the implementation (the Java code) makes it easier to debug, modify and maintain JavaFX GUI apps. 
D)  JavaFX Scene Builder generates FXML (FX Markup Language)-an XML vocabulary for defining and arranging JavaFX GUI controls without writing any Java code. 
A)  JavaFX Scene Builder is a standalone JavaFX GUI visual layout tool that can also be used with various IDEs. 
B)  JavaFX Scene Builder enables you to create GUIs by dragging and dropping GUI components from Scene Builder's library onto a design area, then modifying and styling the GUI-all without writing any code. 
C)  The FXML code is integrated with the program logic that's defined in Java source code-this integration of the interface (the GUI) with the implementation (the Java code) makes it easier to debug, modify and maintain JavaFX GUI apps. 
D)  JavaFX Scene Builder generates FXML (FX Markup Language)-an XML vocabulary for defining and arranging JavaFX GUI controls without writing any Java code.

Question 19

Class NumberFormat of package java.text provides numeric formatting capabilities, such as locale-specific currency and percentage formats.

Accepted Answer

A)  percentage formats 
B)  locale-specific currency 
C)  a and b 
D)  Neither a nor b. 
A)  percentage formats 
B)  locale-specific currency 
C)  a and b 
D)  Neither a nor b.

Question 20

Which of the following statements is false?

Accepted Answer

A)  As of Java SE 8, an anonymous inner class can access its top-level class's instance variables, static variables and methods, but has limited access to the local variables of the method in which it's declared-it can access only the final local variables declared in the enclosing method's body. 
B)  The @FXML annotation preceding an instance variable indicates that the variable's name can be used in the FXML file that describes the app's GUI. 
C)  An anonymous inner class is a class that's declared without a name and typically appears inside a method declaration. 
D)  Since an anonymous inner class has no name, one object of the class must be created at the point where the class is declared. 
A)  As of Java SE 8, an anonymous inner class can access its top-level class's instance variables, static variables and methods, but has limited access to the local variables of the method in which it's declared-it can access only the final local variables declared in the enclosing method's body. 
B)  The @FXML annotation preceding an instance variable indicates that the variable's name can be used in the FXML file that describes the app's GUI. 
C)  An anonymous inner class is a class that's declared without a name and typically appears inside a method declaration. 
D)  Since an anonymous inner class has no name, one object of the class must be created at the point where the class is declared.

Exam 25: JavaFX

To create an app in NetBeans, you must first create a project, i.e., a group of related ________, such as code and images that make up an app.

Which of the following statements is false?

The window in which a JavaFX app's GUI is displayed is known as the________.

To make a layout container the ________ node in a scene graph, select the layout container, then select Scene Builder's Edit > Trim Document to Selection menu item.

Which of the following statements is false?

Which of the following statements is false?

Layout containers help you arrange GUI components. A VBox arranges its nodes________.

NetBeans creates three files for a JavaFX FXML Application project-an FXML markup file for the GUI, a file containing the app's main class and a file containing the app's ________ class.

The space between a node's contents and its top, right, bottom and left edges is known as the ________, which separates the contents from the node's edges.

Which of the following statements is false?

A JavaFX Button's event handler receives a(n) ________, which indicates that the Button was clicked.

The NetBeans ________ window provides access to all of your projects. Within a project's node, the contents are organized into folders and files.

A JavaFX app's main class directly inherits from ________.

Which of the following statements is false?

A VBox's ________ determines the layout positioning of its children.

Which of the following statements is false?

Which of the following statements is false?

Which of the following statements is false?

Class NumberFormat of package java.text provides numeric formatting capabilities, such as locale-specific currency and percentage formats.

Which of the following statements is false?

Introduction to Computers and Java

Introduction to Java Applications

Control Statements

Control Statements

Methods

Arrays and Arraylists

Introduction to Classes and Objects

Classes and Objects: a Deeper Look

Object Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

Exception Handling

Gui Components

Graphics and Java 2D

Fundamentals of Characters and Strings

Files, Streams and Object Serialization

Generic Collections

Lambdas

Recursion

Searching, Sorting and Big O

Generic Classes and Methods

Custom Generic Data Structures

GUI

Concurrency

Accessing Databases With JDBC

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