Deck 12: Graphical User Interfaces Using Java FX

Question 1

Which package does the EventHandler interface belong to?

A) javafx.swing
B) javafx.awt
C) javafx.awt.event
D) javafx.event

Answer 1

D

Question 2

In JavaFX, which package does the ActionEvent class belong to?

A) javafx.swing
B) javafx.awt
C) javafx.awt.event
D) javafx.event

Answer 2

D

Question 3

In JavaFX, clicking on a button generates a(n):

A) ActionEvent.
B) CommandEvent.
C) EnterEvent.

Answer 3

A

Question 4

Selecting a radio button generates a(n):

A) ActionEvent.
B) ItemEvent.
C) RadioButtonEvent.
D) RadioEvent.

Question 5

Selecting a checkbox generates a(n):

A) ActionEvent.
B) ItemEvent.
C) CheckboxEvent.
D) CheckEvent.

Question 6

When writing a class handling the selection of a slider, what interface should be implemented?

A) ActionListener
B) CheckListener
C) SliderListener
D) ChangeListener

Question 7

How many areas inside a window does a BorderPane control?

A) 1
B) 2
C) 3
D) 4
E) 5

Question 8

The __________ class, part of the javafx.scne.media package, enables us to play short sounds.

A) Sound
B) AudioClip
C) Media
D) Music

Question 9

JavaFx supports __________, an animation technique that gives the illusion of a property varying "between" two states by creating and displaying a series of intermediate frames over time.

A) tweening
B) animating
C) in-between
D) illusioning

Question 10

When coding a GUI, it is possible to do it either using an FXML file or programmatically.

Question 11

Using a JComboBox, it is possible to restrict the number of visible items in that combo box list.

Question 12

If a class implements a listener, it cannot listen to events the class generates.

Question 13

A PieChart or a BarChart can be bound to an ObservableList; if the data inside the ObservableList change, we need to call a method of either PieChart or BarChart in order to redraw the chart.

Question 14

The __________ method enables us to identify which component fired an event.

Question 15

The view in a GUI application can be made in an FXML file.

Question 16

The top-level structure in a JavaFX application is the stage, which corresponds to a window. A stage can have one or more nodes, which are top level containers for scenes that make up the window contents.

Question 17

The following organization, in terms of which class inherits from which class, is correct: The Control class inherits from the Region class, which inherits from Parent class, which inherits from Node class, which inherits directly from Object.

Question 18

A radio button is a component that would allow users to select male or female.

Question 19

A text box is a component that would allow users to select as many preferred features as they like from a list of options.

Question 20

GUI programming uses a(n) _____________ model of programming.

A) event-driven
B) float-driven
C) procedural
D) private initiated

Question 21

The Model-View-Controller architecture for writing GUI applications can be placed in the same or in different files.

Question 22

The ActionEvent object is automatically created when the user clicks a button, selects
an item from a list or a menu, or presses the Enter key in a TextField. The ActionEvent object contains data we can query, such as which control fired the event.

Question 23

The method getText of the TextField class (inherited from TextInputControl) returns a String.

Question 24

Which of the following is true about a radio button?

A) Clicking on any button deselects previously selected buttons.
B) It allows the user to check all that apply.
C) A user can select no more than two options.
D) None of these is correct.

Question 25

fx:define defines a name that can be referenced across the FXML application.

Question 26

In JavaFX, selecting a radio button fires both an ItemEvent and an ActionEvent.

Question 27

In JavaFX, which of the following is correct regarding Label versus ComboBox?

A) We cannot instantiate an object of ComboBox.
B) The user cannot interact with Label.
C) The user can use both Label and ComboBox to interact with components.
D) None of these is correct.

Question 28

A combo box will allow the user to choose among a list of items.

Question 29

We want to provide the user with a choice of continuous values between 20 and 50. What JavaFX component could we use?

A) Label
B) Slider
C) RadioButton
D) CheckBox

Question 30

A private inner class can directly access the fields of the public class that it is in.

Question 31

In JavaFX, in order to organize components in a grid, we use the __________ class.

A) GridPane
B) Grid
C) BorderPane
D) HBox

Question 32

The EventHandler interface does not use generics.

Question 33

GridPane would be the best layout container for a monthly calendar to keep track of classes, exams, and social events.

Question 34

Which of the following types of animation does JavaFX not support?

A) Rotate
B) Translate
C) Scatter
D) Fade

Question 35

A GridPane organizes components in five potential areas: left, right, top, bottom, and center. A BorderPane organizes components in rows and columns.

Question 36

You can code the Controller so that it is reusable under certain conditions by using an interface for the Model, instead of a class, inside the Controller class.

Question 37

Components can be nested.

Question 38

In a JavaFX GUI application, a MouseEvent generates if the user clicks with the mouse.

Question 39

In a JavaFX GUI application, a TouchEvent generates if the user touches the screen.

Question 40

The EventHandler interface does not use generics.

Question 41

When a PieChart is bound to an ObservableList, if the data in the latter changes, the PieChart is automatically redrawn.

Question 42

PieChart is a Node and thus can be placed on a Scene.

Question 43

A BarChart is a Node and thus can be added to a Scene.

Question 44

JavaFX does not support CSS.

Question 45

What constructor can we use to set the width and height of a window?

A) Stage( )
B) Scene( )
C) Scene( double, double )
D) Scene( Parent, double, double )

Question 46

What is the function of a GUI component?

A) To display information
B) To enable user interaction
C) To display information and enable user interaction.
D) None of these is correct.

Question 47

Which one of these is not a layout container?

A) GridPane
B) BorderPane
C) HBox
D) Button

Question 48

Clicking on a button generates:

A) an ActionEvent.
B) a CommandEvent.
C) an EnterEvent.

Question 49

Inside an FXML file, if we want to specify a method to execute when the user clicks on a button, we give the name of the method as the value of the __________ attribute.

A) action
B) click
C) onAction
D) actionImplemented

Question 50

Inside an FXML file, to make a group of RadioButtons mutually exclusive, we assign to them the same value for the __________ attribute.

A) buttonGroup
B) group
C) buttonSet
D) toggleGroup
E) radioSet

Question 51

Selecting an item in a combo box generates:

A) an ActionEvent.
B) an ItemEvent.
C) a ListSelectionEvent.
D) a CheckEvent.

Question 52

The interface that we need to implement to handle a Slider event is __________; its only method is _____________.

A) ChangeListener; changeValue
B) ChangeListener; changed
C) SliderListener; changeValue
D) SliderHandler; sliderValue

Question 53

Which of the following can ObservableList not be bound to?

A) PieChart
B) ComboBox
C) Button
D) BarChart

Question 54

Using a BorderPane, which position expands to fill any remaining place?

A) Top
B) Center
C) Bottom
D) Left
E) Right

Question 55

When we use a FadeTransition, what parameter do we give from and to values?

A) x and y
B) Size
C) Opacity
D) Color

Question 56

We can have only one component inside a Pane.

Question 57

An ImageView component can be used to display an image.

Question 58

The repaint method automatically calls the paint method.

Question 59

It is good OOP design to separate the functionality of a program from the GUI that enables a user to interact with the program.

Question 60

Layout containers enable us to control how components are geographically located inside a window.

Question 61

We do not have to use an FXML file to code a GUI; we can do it programmatically.

Question 62

Touching the screen generates a TouchEvent.

Question 63

To set the title of a window, we set the title of the _________.

Question 64

The _________ component is encapsulated by the Label class.

Question 65

Which package does the Pane class belong to?

A) javafx.stage
B) javafx.scene
C) javax.swing
D) javafx.scene.layout

Question 66

When creating a GUI application class using JavaFX, which class do we typically extend?

A) Window
B) JFrame
C) Component
D) Application

Question 67

What are the two methods of the MouseEvent class that enable us to retrieve the x and y coordinates of the mouse?

A) x and y
B) getSceneX and getSceneY
C) getX and getY

Question 68

Which of the following statements is true?

A) If we handle touch events, we cannot handle mouse events.
B) If we handle mouse events, we cannot handle touch events.
C) We can handle both touch and mouse events.

Question 69

Which of the following statements is correct about the EventHandler interface?

A) It is a functional interface.
B) We can use a lambda expression when we want to implement that interface.
C) It has one method, handle.
D) All of these are correct.

Question 70

We can use the __________ method to set the number of times that a JavaFX animation repeats.

A) repeat
B) setRepeat
C) setCycleCount
D) setCount

Question 71

CSS attributes start with the prefix:

A) css.
B) fx.
C) -fx-.
D) css-fx.

Question 72

The Pane class can hold other objects.

Question 73

A user can interact with a Label component.

Question 74

The GUI of an application can be coded using FXML.

Question 75

It is possible to specify, in the FXML file, a method to be called when the user clicks on a button.

Question 76

With JavaFX, it is easy to organize our code using the Model-View-Controller architecture.

Question 77

It is possible to play an animation in reverse.

Question 78

The RadioButton and CheckBoxclasses encapsulate a radio and a checkbox, respectively.

Question 79

In order to set the row and column constraints of a GridPane, we use the RowConstraints and ColumnConstraints classes.

Question 80

The __________ class, a direct subclass of Region, represents an object that can be displayed.