Quiznetik

Java Programming | Set 3

1. What is multithreaded programming?

A. It’s a process in which two different processes run simultaneously.

B. Its a process in which two or more parts of same process run simultaneously.

C. Its a process in which many different process are able to access same information.

D. Its a process in which a single process can access information from many sources.

Correct : B. Its a process in which two or more parts of same process run simultaneously.

2. Which of these are types of multitasking?

A. Process based multitasking

B. Thread based multitasking

C. Both a & b

D. None of the mentioned

Correct : D. None of the mentioned

3. Which of these packages contain all the Java’s built in exceptions?

A. java.io

B. java.util

C. java.lang

D. java.net

Correct : C. java.lang

4. Thread priority in Java is?

A. Integer

B. Float

C. Double

D. Long

Correct : A. Integer

5. What will happen if two thread of same priority are called to be processed simultaneously?

A. Any one will be executed first lexographically

B. Both of them will be executed simultaneously

C. None of them will be executed

D. It is dependent on the operating system.

Correct : D. It is dependent on the operating system.

6. Which of these statements is incorrect?

A. By multithreading CPU’s idle time is minimized, and we can take maximum use of it.

B. By multitasking CPU’s idle time is minimized, and we can take maximum use of it.

C. Two thread in Java can have same priority

D. A thread can exist only in two states, running and blocked.

Correct : D. A thread can exist only in two states, running and blocked.

7. Which method executes only once

A. start() method

B. init() method

C. stop() method

D. destroy() method

Correct : B. init() method

8. Thread class is available in

A. java.io package

B. java.lang package

C. java.awt package

D. java.util package

Correct : B. java.lang package

9. Minimum threads in a program are

A. 1

B. 2

C. 5

D. Many

Correct : A. 1

10. Interfaces helps in which type of inheritance

A. Multiple inheritance

B. Multilevel inheritance

C. Hierarchical inheritance

D. None of above

Correct : A. Multiple inheritance

11. Which of these values is returned by read () method is end of file (EOF) is encountered?

A. 0

B. 1

C. -1

D. Null

Correct : C. -1

12. Which of these exception is thrown by close () and read () methods?

A. IOException

B. FileException

C. FileNotFoundException

D. FileInputOutputException

Correct : A. IOException

13. Which exception is thrown by the read ( ) method of input stream class?

A. Exception

B. ClassNotFoundException

C. read Exception

D. IOException

Correct : D. IOException

14. What garbage collection in the context of java?

A. The operating system periodically deletes all of the java files available on the system.

B. Any package imported in a program and not used in automatically deleted.

C. When all references to an object are gone, the memory used by the object is automatically reclaim

Correct : C. When all references to an object are gone, the memory used by the object is automatically reclaim

15. In order for a source code file, containing the public class test, to successfully compile, which of the following must be true?

A. It must have a package statement

B. It must be named test.java

C. It must import java.lang

D. It must declare a public class named test.

Correct : B. It must be named test.java

16. Which of the following are true about the Error and Exception classes?

A. Both classes extend throwable

B. The error class is final and exception class is not.

C. The Exception class is final and the Error is not.

D. Both classes implement Throwable

Correct : A. Both classes extend throwable

17. Which of the following are true?

A. The void class extends the class class

B. The float class extends double class

C. The system class extends the runtime class

D. The integer class extends the number class

Correct : D. The integer class extends the number class

18. How do you create a Reader object from an InputStream object?

A. Use the static createReader() method of InputStream class

B. Use the static createReader() method of Reader class

C. Create an InputStreamReader object passing the InputStream object and an argument to the InputStreamReader constructor.

D. Create an OutputStreamReader object, passing the InputStream object as an argument to the OutputStreamReader constructor.

Correct : C. Create an InputStreamReader object passing the InputStream object and an argument to the InputStreamReader constructor.

19. Which of the following is true?

A. The event inheritance model has replaced the event delegation model

B. The event inheritance model is more efficient than event delegation model

C. The event delegation model uses event listeners to define the methods of event handling classes.

D. The event delegation model uses the handleEvent() method to support event handling.

Correct : C. The event delegation model uses event listeners to define the methods of event handling classes.

20. Which of the following is the highest class in the event delegation model?

A. java.util.EventListner

B. java.util.EventObject

C. java.util.AWTEvent

D. java.util.event.AWTEvent

Correct : B. java.util.EventObject

21. When two or more objects are added as listeners for the same event, which listener is first invoked to handle the event?

A. The first object that was added as listner.

B. The last object that was added as listner

C. There is no way to determine which listener will be invoked first.

D. It is impossible to have more than one listener for a given event.

Correct : C. There is no way to determine which listener will be invoked first.

22. Suppose that you want to have an object eh handle the TextEvent of TextArea object t. How should you add eh as the event handler for?

A. t.addTextListener(eh);

B. eh.addTextListner(t);

C. addTextListner(eh.t);

D. addTextListner(t,eh);

Correct : D. addTextListner(t,eh);

23. Which is true about an anonymous inner class?

A. It can extend exactly one class and implement exactly one interface.

B. It can extend exactly one class and can implement multiple interfaces.

C. It can extend exactly one class or implement exactly one interface.

D. It can implement multiple interfaces regardless of whether it also extends a class.

Correct : C. It can extend exactly one class or implement exactly one interface.

24. Which is true about a method-local inner class?

A. It must be marked final.

B. It can be marked abstract.

C. It can be marked public.

D. It can be marked static.

Correct : B. It can be marked abstract.

25. Which statement is true about a static nested class?

A. You must have a reference to an instance of the enclosing class in order to instantiate it.

B. It does not have access to nonstatic members of the enclosing class.

C. It's variables and methods must be static.

D. It must extend the enclosing class.

Correct : B. It does not have access to nonstatic members of the enclosing class.

26. Which of these is correct way of inheriting class A by class B?

A. class B + class A {}

B. class B inherits class A {}

C. class B extends A {}

D. class B extends class A {}

Correct : C. class B extends A {}

27. Which of the following are true about interfaces.

A. Methods declared in interfaces are implicitly private.

B. Variables declared in interfaces are implicitly public, static, and final.

C. An interface contains any number of method definitions.

D. The keyword implements indicate that an interface inherits from another.

Correct : B. Variables declared in interfaces are implicitly public, static, and final.

28. Which of the following is correct way of implementing an interface salary by class manager?

A. class Manager extends salary {}

B. class Manager implements salary {}

C. class Manager imports salary {}

D. None of the mentioned.

Correct : B. class Manager implements salary {}

29. Which of the following is incorrect statement about packages?

A. Package defines a namespace in which classes are stored.

B. A package can contain other package within it.

C. Java uses file system directories to store packages.

D. A package can be renamed without renaming the directory in which the classes are stored.

Correct : D. A package can be renamed without renaming the directory in which the classes are stored.

30. Which exception is thrown by read() method?

A. IOException

B. InterruptedException

C. SystemException

D. SystemInputException

Correct : A. IOException

31. Which method in Thread class is used to check weather a thread is still running?

A. isAlive()

B. Join()

C. isRunning()

D. Alive()

Correct : A. isAlive()

32. Which of these class contains the methods print() & println()?

A. System

B. System.out

C. BufferedOutputStream

D. PrintStream

Correct : D. PrintStream

33. To design a general-purpose search method, searchList, to search a list, which of the following must be parameters of the method searchList? (i) The array containing the list. (ii) The length of the list. (iii) The search item. (iv) A boolean variable indicating whether the search is successful.

A. (i) and (ii)

B. (i), (ii), and (iii)

C. (ii), (iii), and (iv)

D. (i), (ii), (iii), and (iv)

Correct : B. (i), (ii), and (iii)

34. Consider the following list.list = {24, 20, 10, 75, 70, 18, 60, 35} Suppose that list is sorted using the selection sort algorithm as discussed in the book. What is the resulting list after two passes of the sorting phase, that is, after two iteration of the outer for loop?

A. list = {10, 18, 24, 20, 75, 70, 60, 35}

B. list = {10, 18, 20, 24, 75, 70, 60, 35}

C. list = {10, 18, 24, 75, 70, 20, 60, 35}

D. None of these

Correct : C. list = {10, 18, 24, 75, 70, 20, 60, 35}

35. Which method would you most likely use to add an element to an end of a vector?

A. insertElementAt

B. addElement

C. copyInto

D. lastElement

Correct : B. addElement

36. In which package is the class Vector located?

A. java.io

B. java.lang

C. java.util

D. java.text

Correct : C. java.util

37. An abstract method ____.

A. is any method in the abstract class

B. cannot be inherited

C. has no body

D. is found in a subclass and overrides methods in a super-class using the reserved word abstract

Correct : C. has no body

38. The classes Reader and Writer are derived from the class _________.

A. Streams

B. Inputs

C. Outputs

D. Object

Correct : D. Object

39. The method toString() is a public member of the class _____________.

A. Object

B. String

C. Writer

D. Output

Correct : A. Object

40. For the interface WindowListener that contains more than one method, Java provides the class ____.

A. MouseAdapter

B. WindowAdapter

C. KeyListener

D. KeyAdapter

Correct : B. WindowAdapter

41. If a negative value is used for an array index, ____.

A. a NumberFormatException is thrown

B. the program terminates immediately

C. the last index of the array is automatically accessed instead

D. an IndexOutOfBoundsException is thrown

Correct : D. an IndexOutOfBoundsException is thrown

42. Consider the following list. int[] intList = {35, 12, 27, 18, 45, 16, 38}; What is the minimum number of comparisons that have to be made to find 18 using a sequential search on intList?

A. 1

B. 2

C. 3

D. 4

Correct : D. 4

43. Which of these packages contains all the classes and methods required for even handling in Java?

A. java.applet

B. java.awt

C. java.event

D. java.awt.event

Correct : D. java.awt.event

44. 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.

Correct : A. An event is an object that describes a state change in a source.

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

A. KeyListener()

B. addKistener()

C. addKeyListener()

D. eventKeyboardListener()

Correct : C. addKeyListener()

46. Which of these methods are used to register a mouse motion listener?

A. addMouse()

B. addMouseListener()

C. addMouseMotionListner()

D. eventMouseMotionListener()

Correct : C. addMouseMotionListner()

47. 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 a object 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

Correct : B. A listener is a object that is notified when an event occurs.

48. Which command disassembles a class file

A. javaamd

B. javacmd

C. java

D. javap

Correct : D. javap

49. JDBC stands for:

A. Java Database Connectivity

B. Java Database Components

C. Java Database Control

D. None of the above is correct.

Correct : A. Java Database Connectivity

50. Which of the following statements is false as far as different type of statements is concern in JDBC?

A. Regular Statement

B. Prepared Statement

C. Callable Statement

D. Interim Statement

Correct : D. Interim Statement

51. Which statement is static and synchronized in JDBC API?

A. executeQuery()

B. executeUpdate()

C. getConnection()

D. prepareCall()

Correct : C. getConnection()

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

A. Type – 4

B. Type – 1

C. Type – 3

D. Type – 2

Correct : A. Type – 4

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

A. CheckBox

B. Canvas

C. CheckbocGroup

D. Label

Correct : C. CheckbocGroup

54. What is default layout manager for panels and applets?

A. Flowlayout

B. Gridlayout

C. BorderLayout

D. none

Correct : A. Flowlayout

55. 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

Correct : B. Specify the postion of components upper-left component in the coordinate space of the component's parent.

56. 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

Correct : C. DatabaseMetaData.getMaxConnections

57. 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.

Correct : A. At client side, a separate driver is needed for each database.

58. 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.

Correct : B. Add one or more event listeners to handle the events

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

A. getVisible()

B. getImmediate()

C. getParent()

D. getContainer()

Correct : C. getParent()

60. 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)

Correct : A. new List(5, true)

61. 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();

Correct : B. setLayout(new GridLayout(2,2));

62. 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

Correct : A. Use the setLayout method.

63. 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()

Correct : A. drawLine()

64. 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

Correct : C. i-false, ii-true, iii-false, iv-false

65. 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

Correct : A. True, True, False, False

66. 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

Correct : A. a-i, b-iv, c-iii, d-ii

67. 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

Correct : A. True, True, False, True

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

A. String

B. Character

C. Stream

D. Buffer

Correct : C. Stream

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

A. flush()

B. clear()

C. rub()

D. vanish()

Correct : C. rub()

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

A. display()

B. print()

C. drawString()

D. transient()

Correct : C. drawString()

71. Which of these methods are used to register a MouseMotionListener?

A. addMouse()

B. addMouseListener()

C. addMouseMotionListner()

D. eventMouseMotionListener()

Correct : C. addMouseMotionListner()

72. 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

Correct : B. A listener is an interface that is notified when an event occurs.

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

A. ActionEvent

B. ComponentEvent

C. AdjustmentEvent

D. WindowEvent

Correct : D. WindowEvent

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

A. ActionEvent

B. ComponentEvent

C. AdjustmentEvent

D. WindowEvent

Correct : D. WindowEvent

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

A. getKeyCode()

B. getModifier()

C. getActionKey()

D. getActionEvent()

Correct : A. getKeyCode()

76. The default layout manager of an Applet is

A. Flowlayout

B. Gridlayout

C. BorderLayout

D. BoxLayout

Correct : A. Flowlayout

77. The processes that participate in supporting remote method invocation are

A. Client

B. Server

C. Object Registry

D. All of the above

Correct : D. All of the above

78. Through the design mode of a builder tool, we use _ or __ to customize the bean.

A. Property sheet

B. Bean customizer

C. Either (a) or (c)

D. None of the above

Correct : C. Either (a) or (c)

79. Swing is a ___________ framework

A. connection-based

B. component-based

C. platform-based

D. None of the above

Correct : B. component-based

80. How many kinds of classes can be used in Java RMI?

A. One

B. Two

C. Three

D. Four

Correct : B. Two

81. Which method is used to enable an event for a particular object?

A. enableEvent()

B. enable()

C. enableObject()

D. enableEvents()

Correct : D. enableEvents()

82. How would you detect a keypress in a JComboBox?

A. Add a KeyListener to the JComboBox

B. Add a KeyListener to the JComboBox’s editor component

C. Either (a) or (b)

D. None of the above

Correct : B. Add a KeyListener to the JComboBox’s editor component

83. Which Swing methods are thread-safe?

A. repaint()

B. revalidate()

C. invalidate()

D. all of the above

Correct : D. all of the above

84. Which of the following is not true?

A. The Frame class extends Window

B. The CheckboxMenuItem class extends the MenuItem class

C. JComponent is a subclass of Container

D. None of the above

Correct : D. None of the above

85. What is the correct way to write a JavaScript array?

A. var txt = new Array:1=("tim")2=("kim")3=("jim")

B. var txt = new Array(1:"tim",2:"kim",3:"jim")

C. var txt = new Array="tim","kim","jim")

D. var txt = new Array("tim","kim","jim")

Correct : D. var txt = new Array("tim","kim","jim")

86. What is the correct JavaScript syntax to insert a comment that has more than one line?

A.

B. /*This comment has more than one line*/

C. //This comment has more than one line//

D. <//This comment has more than one line//>

Correct : B. /*This comment has more than one line*/

87. What is Remote method invocation (RMI)?

A. RMI allows us to invoke a method of java object that executes on another machine.

B. RMI allows us to invoke a method of java object that executes on another Thread in multithreaded programming.

C. RMI allows us to invoke a method of java object that executes parallely in same machine.

D. None of the mentioned

Correct : A. RMI allows us to invoke a method of java object that executes on another machine.

88. Which of this package is used for remote method invocation?

A. java.applet

B. java.rmi

C. java.lang.rmi

D. java.lang.reflect

Correct : B. java.rmi

89. Which of these methods are member of Remote class?

A. checkIP()

B. addLocation()

C. AddServer()

D. None of the mentioned

Correct : D. None of the mentioned

90. Which of these Exceptions is thrown by remote method?

A. RemoteException

B. InputOutputException

C. RemoteAccessException

D. RemoteInputOutputException

Correct : A. RemoteException

91. Which of this class is used for creating a client for server-client operations?

A. serverClientjava

B. Client.java

C. AddClient.java

D. ServerClient.java

Correct : C. AddClient.java

92. Which of this package is used for all the text related modifications?

A. java.text

B. java.awt

C. java.lang.text

D. java.text.mofify

Correct : A. java.text

93. Which of this package contains classes and interfaces for networking?

A. java.io

B. java.util

C. java.net

D. java.network

Correct : C. java.net

94. Which of these is superclass of ContainerEvent class?

A. WindowEvent

B. ComponentEvent

C. ItemEvent

D. InputEvent

Correct : B. ComponentEvent

95. Which of these events is generated when the size os an event is changed?

A. ComponentEvent

B. ContainerEvent

C. FocusEvent

D. InputEvent

Correct : A. ComponentEvent

96. Which of these methods can be used to obtain the reference to the container that generated a ContainerEvent?

A. getContainer()

B. getContainerCommand()

C. getActionEvent()

D. getContainerEvent()

Correct : D. getContainerEvent()

97. To locate a remote object with a name t at port 7000 on host panda.armstrong.edu, use

A. Remote remoteObj = Name.lookup("rmi://panda.armstrong.edu:7000/t");

B. Remote remoteObj = Name.lookup("//panda.armstrong.edu:7000/t");

C. Remote remoteObj = Name.lookup("http://panda.armstrong.edu:7000/t");

D. Remote remoteObj = Naming.lookup("rmi://panda.armstrong.edu:7000/t");

Correct : D. Remote remoteObj = Naming.lookup("rmi://panda.armstrong.edu:7000/t");

98. ____________ is a subinterface of java.rmi.Remote that defines the methods for the server object.

A. Server stub

B. Server implementation

C. Server object interface

D. RMI Registry

Correct : C. Server object interface

99. Each remote object has a unique name identified by an URL with the protocol rmi as follows:

A. http://host:port/name

B. //host:port/name

C. http://host/name

D. rmi://host:port/name

Correct : B. //host:port/name

100. __________ provides the naming services for the server to register the object and for the client to locate the object.

A. Server stub

B. RMI Registry

C. Server implementation

D. Server Skeleton

Correct : B. RMI Registry

Quiznetik

Java Programming | Set 3

1. What is multithreaded programming?

2. Which of these are types of multitasking?

3. Which of these packages contain all the Java’s built in exceptions?

4. Thread priority in Java is?

5. What will happen if two thread of same priority are called to be processed simultaneously?

6. Which of these statements is incorrect?

7. Which method executes only once

8. Thread class is available in

9. Minimum threads in a program are

10. Interfaces helps in which type of inheritance

11. Which of these values is returned by read () method is end of file (EOF) is encountered?

12. Which of these exception is thrown by close () and read () methods?

13. Which exception is thrown by the read ( ) method of input stream class?

14. What garbage collection in the context of java?

15. In order for a source code file, containing the public class test, to successfully compile, which of the following must be true?

16. Which of the following are true about the Error and Exception classes?

17. Which of the following are true?

18. How do you create a Reader object from an InputStream object?

19. Which of the following is true?

20. Which of the following is the highest class in the event delegation model?

21. When two or more objects are added as listeners for the same event, which listener is first invoked to handle the event?

22. Suppose that you want to have an object eh handle the TextEvent of TextArea object t. How should you add eh as the event handler for?

23. Which is true about an anonymous inner class?

24. Which is true about a method-local inner class?

25. Which statement is true about a static nested class?

26. Which of these is correct way of inheriting class A by class B?

27. Which of the following are true about interfaces.

28. Which of the following is correct way of implementing an interface salary by class manager?

29. Which of the following is incorrect statement about packages?

30. Which exception is thrown by read() method?

31. Which method in Thread class is used to check weather a thread is still running?

32. Which of these class contains the methods print() & println()?

34. Consider the following list.list = {24, 20, 10, 75, 70, 18, 60, 35} Suppose that list is sorted using the selection sort algorithm as discussed in the book. What is the resulting list after two passes of the sorting phase, that is, after two iteration of the outer for loop?

35. Which method would you most likely use to add an element to an end of a vector?

36. In which package is the class Vector located?

37. An abstract method ____.

38. The classes Reader and Writer are derived from the class _________.

39. The method toString() is a public member of the class _____________.

40. For the interface WindowListener that contains more than one method, Java provides the class ____.

41. If a negative value is used for an array index, ____.

42. Consider the following list. int[] intList = {35, 12, 27, 18, 45, 16, 38}; What is the minimum number of comparisons that have to be made to find 18 using a sequential search on intList?

43. Which of these packages contains all the classes and methods required for even handling in Java?

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

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

46. Which of these methods are used to register a mouse motion listener?

47. What is a listener in context to event handling?

48. Which command disassembles a class file

49. JDBC stands for:

50. Which of the following statements is false as far as different type of statements is concern in JDBC?

51. Which statement is static and synchronized in JDBC API?

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

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

54. What is default layout manager for panels and applets?

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

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

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

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

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

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

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

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

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

64. 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

65. 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

66. 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

67. 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

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

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

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

71. Which of these methods are used to register a MouseMotionListener?

72. What is a listener in context to event handling?

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

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

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

76. The default layout manager of an Applet is

77. The processes that participate in supporting remote method invocation are

78. Through the design mode of a builder tool, we use ___ or ____ to customize the bean.

79. Swing is a ___________ framework

78. Through the design mode of a builder tool, we use _ or __ to customize the bean.