Deck 11: Java Programming : JDBC API, Layout Managers, and Event Handling

Question 1

Which statement is static and synchronized in JDBC API?

A)executeQuery()
B)executeUpdate()
C)getConnection()
D)prepareCall()

Answer 1

getConnection()

Question 2

Which driver is efficient and always preferable for using JDBC applications?

A)Type - 4
B)Type - 1
C)Type - 3
D)Type - 2

Answer 2

Type - 4

Question 3

Which one of the following does not extends java.awt.Component

A)CheckBox
B)Canvas
C)CheckbocGroup
D)Label

Answer 3

CheckbocGroup

Question 4

What is default layout manager for panels and applets?

A)Flowlayout
B)Gridlayout
C)BorderLayout
D)None of above

Question 5

java.awt.Component class method getLocation() returns Point (containg x and y cordinate).What does this x and y specify

A)Specify the postion of components lower-left component in the coordinate space of the component's parent.
B)Specify the postion of components upper-left component in the coordinate space of the component's parent.
C)Specify the postion of components upper-left component in the coordinate space of the screen.
D)None of above

Question 6

Which of the following methods finds the maximum number of connections that a specific driver can obtain?

A)Database.getMaxConnections
B)Connection.getMaxConnection
C)DatabaseMetaData.getMaxConnections
D)ResultSetMetaData.getMaxConnections

Question 7

What is the disadvantage of Type-4 Native-Protocol Driver?

A)At client side, a separate driver is needed for each database.
B)Type-4 driver is entirely written in Java
C)The driver converts JDBC calls into vendor-specific database protocol
D)It does not support to read MySQL data.

Question 8

What is the preferred way to handle an object's events in Java 2?

A)Override the object's handleEvent( ) method.
B)Add one or more event listeners to handle the events
C)Have the object override its process Event ( ) methods.
D)Have the object override its dispatch Event ( ) methods.

Question 9

Which component method is used to access a component's immediate container?

A)getVisible()
B)getImmediate()
C)getParent()
D)getContainer()

Question 10

Which of the following creates a List with 5 visible items and multiple selections enabled?

A)new List(5, true)
B)new List(true, 5)
C)new List(5, false)
D)new List(false, 5)

Question 11

An Applet has its Layout Manager set to the default of FlowLayout. What code would be the correct to change to another Layout Manager?

A)setLayoutManager(new GridLayout());
B)setLayout(new GridLayout(2,2));
C)setGridLayout(2,2);
D)setBorderLayout();

Question 12

How do you change the current layout manager for a container?

A)Use the setLayout method.
B)Once created you cannot change the current layout manager of a component
C)Use the setLayoutManager meth

Question 13

Which of the following methods can be used to draw the outline of a square within a JAVA.awt.Component object?

A)drawLine()
B)fillRect()
C)drawPolygon().
D)drawPolygon()

Question 14

State true or false
(i) JPanel is a class included in awt package
(ii) Anonymous classes are mostly used for event handling
(iii) Names of anonymous classes must be unique
(iv) JOptionPane is an inner class

A)i-false, ii-false, iii-true, iv-true
B)i-true, ii-false, iii-true, iv-false
C)i-false, ii-true, iii-false, iv-false
D)i-true, ii-true, iii-false, iv-true

Question 15

State true or false
(i) Java RMI supports distributed objects written entirely in java
(ii) Java RMI makes use of stubs and skeleton
(iii) In Java RMI an object registers itself with a media server
(iv) IDL is interface declaration language

A)True, True, False, False
B)False, True, True, True
C)True, False, True, False
D)True, True, True, True

Question 16

Match the following
(a) Datagram Socket (i) UDP connection
(b) URL (ii) provides a necessary framework of debugging java programs
(c) java.net (iii) makes it possible to communicate over a network with java programs
(d) sun.tools.debug (iv) is a java object that represents WWW address

A)a-i, b-iv, c-iii, d-ii
B)a-i, b-iv, c-ii, d-iii
C)a-ii, b-iii, c-i, d-iv
D)a-ii, b-i, c-iii, d-iv

Question 17

State true or false
(i) public can only be assigned to class
(ii) protected protects a statement
(iii) protected method is never accessible outside the package
(iv) friendly variable may be accessible outside class

A)True, True, False, True
B)False, False, False, True
C)False, True, False, False
D)True, False, False, False

Question 18

Which refers to a channel through which data flow from the source to the destination:

A)String
B)Character
C)Stream
D)Buffer

Question 19

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

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

Question 20

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

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

Question 21

Which of these methods are used to register a MouseMotionListener?

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

Question 22

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 23

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

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

Question 24

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

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

Question 25

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

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