Deck 5: Java Inputoutput and Event Handling

Question 1

The ________ method help in clearing the contents of the buffer:

A)flush()
B)clear()
C)rub()
D)vanish()

Answer 1

flush()

Question 2

The _______ class is used to write bytes to a file:

A)FileInputStream
B)FileOutputStream
C)FileBufferStream
D)FileStringStream

Answer 2

FileOutputStream

Question 3

The _______ class is used to read characters from the file:

A)StreamReader
B)CharacterReader
C)InputReader
D)FileReader

Answer 3

FileReader

Question 4

DataInputStream class contains methods to read________

A)Non primitive data type
B)Primitive data type
C)Formatted data
D)all of the above

Question 5

Whenever the applet requires to redraw its output, it is done by using method

A)display()
B)paint()
C)displayApplet()
D)PrintApplet()

Question 6

Which of these methods can be used to output a string in an applet?

A)display()
B)print()
C)drawString()
D)transient()

Question 7

What does AWT stands for?

A)All Window Tools
B)All Writing Tools
C)Abstract Window Toolkit
D)Abstract Writing Toolkit

Question 8

Which of these packages contains all the classes and methods required for event handling in Java? a) jav

A)applet
B)java.awt
C)java.event
D)java.awt.event

Question 9

What is an event in delegation event model used by Java programming language?

A)An event is an object that describes a state change in a source.
B)An event is an object that describes a state change in processing.
C)An event is an object that describes any change by the user and system.
D)An event is a class used for defining object, to create events.

Question 10

Which of these methods are used to register a keyboard event listener?

A)KeyListener()
B)addKistener()
C)addKeyListener()
D)eventKeyboardListener()

Question 11

Which of these methods are used to register a MouseMotionListener?

A)addMouse()
B)addMouseListener()
C)addMouseMotionListner()
D)eventMouseMotionListener()

Question 12

What is a listener in context to event handling?

A)A listener is a variable that is notified when an event occurs.
B)A listener is an interface that is notified when an event occurs.
C)A listener is a method that is notified when an event occurs.
D)None of the mentioned

Question 13

Which of these class is super class of all AWT events?

A)AWTEvent
B)EventClass
C)ActionEvent
D)ItemEvent

Question 14

Which of these events will be generated if scroll bar is manipulated?

A)ActionEvent
B)ComponentEvent
C)AdjustmentEvent
D)WindowEvent

Question 15

Which of these events will be generated if we close a Frame window?

A)ActionEvent
B)ComponentEvent
C)AdjustmentEvent
D)WindowEvent

Question 16

Which of these events is generated when a button is pressed?

A)ActionEvent
B)KeyEvent
C)WindowEvent
D)AdjustmentEvent

Question 17

Which of these methods can be used to obtain the command name for ActionEvent object?

A)getCommand()
B)getActionCommand()
C)getActionEvent()
D)getActionEventCommand()

Question 18

Which of these methods in KeyEvent class can be used to know which key is pressed?

A)getKeyCode()
B)getModifier()
C)getActionKey()
D)getActionEvent()

Question 19

Which of these interfaces define a method actionPerformed()?

A)ComponentListener
B)ContainerListener
C)ActionListener
D)InputListener

Question 20

Which of these interfaces define a method itemStateChanged()?

A)ComponentListener
B)ContainerListener
C)ActionListener
D)ItemListener

Question 21

What are the sequences of method executed when an Applet starts execution?

A)init(),start(),stop(),destroy()
B)load(),start(),stop(),unload()
C)init(),activate(),deactivate(),destroy()
D)start(),init(),destroy(),stop()

Question 22

The default layout manager of an Applet is

A)Flowlayout
B)Gridlayout
C)BorderLayout
D)BoxLayout

Question 23

The default layout manager of a Frame is

A)Flowlayout
B)Gridlayout
C)BorderLayout
D)BoxLayout

Question 24

Which package consist an applet class?

A) java.applet
B)java.awt
C)java.awt.applet
D)java.event