Deck 14: Applets and More

Question 1

Given the following code,how many times per second will the TimerListener event be generated? Timer timer = new Timer(1000,new TimerListener());

A) 1
B) 10
C) 100
D) 1000

Answer 1

A

Question 2

Which of the following sound file formats does Java not support?

A) .wav
B) .au
C) .mid
D) Java supports all of the above

Answer 2

D

Question 3

These are Java programs that are usually part of a Web site.

A) Applications
B) Applets
C) Classes
D) Web services

Answer 3

B

Question 4

A mouse motion listener class can respond to:

A) The mouse button is clicked on
B) The mouse cursor exits a component's screen space
C) The mouse moved
D) The mouse button is released

Question 5

When the applet viewer opens an HTML document with more than one < APPLET > tag,

A) it terminates immediately.
B) it displays the first applet,and then terminates.
C) it displays each applet in a separate window.
D) it displays each applet in order in the same window.

Question 6

What does the tag < p > cause to happen?

A) A double space
B) A paragraph break
C) Indentation for a paragraph
D) Plain text to be displayed

Question 7

Which of the following is not a restriction placed on applets?

A) Applets cannot create files on the user's system.
B) Applets cannot execute operating system procedures on the user's system.
C) Applets cannot display a window.
D) Applets cannot retrieve the user's identity.

Question 8

If a frame component is 200 pixels wide and 300 pixels high,the lower,left-hand corner has (X,Y)coordinates of

A) (0,299)
B) (0,300)
C) (200,0)
D) (0,0)

Question 9

Which of the following is not a valid AWT class?

A) Panel
B) Applet
C) TextArea
D) JMenu

Question 10

In an HTML document,the tags

A) instruct the Web browser how to format the text.
B) instruct the Web browser where to place images.
C) instruct the Web browser what to do when the user clicks on a link.
D) All of the above

Question 11

Hypertext can contain

A) a Java application program
B) exception methods
C) executable code
D) a link to another Web page

Question 12

Which tag will produce largest text?

A) < h4 >Hello< /h4 >
B) < h3 >Hello< /h3 >
C) < h2 >Hello< /h2 >
D) < h1 >Hello< /h1 >

Question 13

Certain restrictions are placed on applets.If an applet attempts to violate one of these restrictions,

A) the program has a fatal error.
B) it will display a window stating that it has violated the restriction.
C) an exception is thrown.
D) it automatically notifies the Web server of the violation.

Question 14

Applets are important because the can be used to

A) extend the capabilities of a web page.
B) process large data files.
C) run other programs on the user's system.
D) keep the doctor away.

Question 15

An applet using a Swing GUI extends which class?

A) Applet
B) JApplet
C) JSwing
D) JFrame

Question 16

Which of the following will load the applet,TestApplet?

A) < applet code="TestApplet.class" width=200 height=50 >< /applet >
B) < applet code=TestApplet.class width=200 height=50 >< /applet >
C) < load code="TestApplet.class" width=200 height=50 >< /load >
D) < load code=TestApplet.class width=200 height=50 >< /load >

Question 17

When you extend an interface,you must implement all the methods defined in the interface.If you are interested in only one or two mouse events,you can extend the _______ class which implements the MouseListener interface,but does not require you to write all the functions in the interface.

A) MouseAdapter
B) MouseExtender
C) MouseMotionAdapter
D) MouseMotionExtender

Question 18

What does the HTML tag < hr > cause to happen?

A) A header routine is created.
B) A horizontal line will be displayed.
C) A default header reference will be linked to.
D) The window will be blanked out before the remainder of the text is displayed.

Question 19

In the link produced by the following HTML,what word would you click to go to the linked location? Click here to learn more about
< a href="http://www.applications.com" >applications.< /a >

A) Click
B) here
C) Click here to learn more about
D) applications

Question 20

In the following code,which line has an error? 1 public class TestApplet extends JApplet
2 {
3 public void init()
4 {
5 super.JApplet();
6 JLabel label = new JLabel("Test label");
7 setLayout(new FlowLayout());
8 add(label);
9 }
10 }

A) 1
B) 3
C) 5
D) There are no errors

Question 21

The play method will load and play a sound file once,then release it for garbage collection.The getAudioClip method will load the sound file and may assign the location of the sound file to a variable so it may be invoked many times.

Question 22

Some browsers do not directly support the Swing classes of applets.

Question 23

In an applet,events are handled

A) with special applet event listeners.
B) differently,depending upon which computer is running the applet.
C) with event listeners exactly as they are in GUI applications.
D) by always terminating the applet.

Question 24

In the following code,what does getDocumentBase()return? play(getDocumentBase(),"mysound.wav");

A) A URL object containing the location of the applet's .class file
B) A URL object containing the location of the HTML file that invoked the applet
C) The HTML location "mysound.wav"
D) The sound file itself

Question 25

The Applet class requires that you write a constructor to create an object of the class.

Question 26

For all Swing components except JApplet and JFrame,you should override the paintComponent method instead of the paint method.

Question 27

In the following code that uses a Swing GUI,which line has an error? 1 public class TestApplet extends Applet
2 {
3 public void init()
4 {
5 JLabel label = new JLabel("Test label");
6 setLayout(new FlowLayout());
7 add(label);
8 }
9 }

A) 1
B) 3
C) 5
D) There are no errors

Question 28

The delay parameter in the Timer constructor is the amount of time between action events,measured in milliseconds.

Question 29

Given the following code,how many times per second will the TimerListener event be generated? Timer timer = new Timer(500,new TimerListener());

A) 5
B) 50
C) 2
D) 500

Question 30

The browser creates an instance of the applet class automatically.

Question 31

Everything that appears between these tags in an HTML document is the content of the Web page.

A) < head > and < /head >
B) < html > and < /html >
C) < doc > and < /doc >
D) < content > and < /content >

Question 32

One way of viewing the results of the applet which is invoked in the HTML document TestApplet.html,is to enter the following at the command prompt.

A) appletviewer TestApplet.html
B) appleviewer TestApplet
C) viewapplet TestApplet.html
D) view TestApplet

Question 33

The following getAudioClip()method returns an object that will load the sound file and assign the location of that file to clip which can then be used to call methods that may play the sound file one or more times:
Audioclip clip = getAudioClip(getDocumentBase(),"mysound.wav");

Question 34

An applet using a Swing GUI is extended from this class.

A) JFrame
B) JLabel
C) JSwing
D) JApplet

Question 35

If you want to make sure that an applet is compatible with all Java-enabled browsers,use Swing components instead of AWT.

Question 36

If a frame component is 300 pixels wide and 200 pixels high,the upper,right-hand corner has (X,Y)coordinates of

A) (0,0)
B) (300,0)
C) (200,300)
D) (299,0)

Question 37

Whenever you need a component of any type to be painted,call the paint method.

Question 38

Which of the following can a mouse listener respond to?

A) The mouse button is pressed
B) The mouse button is clicked
C) The mouse cursor enters a component's screen space
D) All of the above

Question 39

The delay parameter in the Timer constructor is the amount of time between action events,measured in microseconds.