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Basic Java ME (Java Platform, Micro Edition) MCQ

1. Which of the following are a part of the CLDC expert group?

Siemens

Samsung

Sharp

Oracle

Fujitsu

All of the above

None of the above

Answer

Correct Answer: All of the above

Note: This Question is unanswered, help us to find answer for this one

2. Which of the following are a part of the CLDC expert group?

Nokia

Motorola

Sony

Ericsson

Symbian

All of the above

Only a, b and e

Answer

Correct Answer: All of the above

Note: This Question is unanswered, help us to find answer for this one

3. The minimum number of threads supported by JTWI complaint implementations are:

Answer

Correct Answer: 10

Note: This Question is unanswered, help us to find answer for this one

4. The CLDC properties are defined in:

microedition.platform

microedition.profiles

microedition.configuration

microedition.reflection

Answer

Correct Answer: microedition.platform

Note: This Question is unanswered, help us to find answer for this one

5. The CLDC specific classes are defined in a package called:

javax.cldc.io

javax.configuration.util

javax.j2me.util

javax.microedition.io

Answer

Correct Answer: javax.microedition.io

Note: This Question is unanswered, help us to find answer for this one

6. Which of the following form a part of CLDC?

Event handling

Database support

Additional I/O and networking libraries

Security features

Answer

Correct Answer: Additional I/O and networking libraries

Note: This Question is unanswered, help us to find answer for this one

7. The default mode for an open connection is:

READ

WRITE

READ_WRITE

Any of the above

Answer

Correct Answer: READ_WRITE

Note: This Question is unanswered, help us to find answer for this one

8. Mids server should only download data which has a MIME type of:

text/vnd.sun.j2me.app-configuration

text/vnd.sun.j2me.app-description

text/vnd.sun.j2me.domain-configuration

text/vnd.sun.j2me.domain-description

Answer

Correct Answer: text/vnd.sun.j2me.app-description

Note: This Question is unanswered, help us to find answer for this one

9. What would be the values for boxes 1 and 2 respectively in the given Generic Framework figure?

Content connection and stream connection

Stream connection and content connection

Data Notifier and stream connection

Answer

Correct Answer: Stream connection and content connection

Note: This Question is unanswered, help us to find answer for this one

10. Which of the following is designed for very small memory scenarios, typically 128 KB to 512 KB for the Java application environment?

CDC HotSpot Implementation

CLDC HotSpot Implementation

Java HotSpot Client

Answer

Correct Answer: CLDC HotSpot Implementation

Note: This Question is unanswered, help us to find answer for this one

11. Which of the following could be the reasons for the introduction of the Generic Connection framework?

In J2SE Networking classes, the total size was greater than 200Mb

J2SE Networking classes assume TCP/IP is available

Both of the above

Answer

Correct Answer: Both of the above

Note: This Question is unanswered, help us to find answer for this one

12. What would you infer from the following code?
1.MessageConnection conn;
2.
3. public void startApp()
4. {
5.
6. try
7. {
8. conn = (MessageConnection)Connector.open("cbs://:3382");
9. }
10. catch(Exception e)
11. {
12. //Some exception handling
13. }
14. }
15.
16. public void run()
17. {
18. Message msg = conn.receive();
19. conn.send(msg);
20. }

There is an error on line 8

There is an error on line 18

There is an error on line 19

Answer

Correct Answer: There is an error on line 18

Note: This Question is unanswered, help us to find answer for this one

13. Which of the following profile is supported by CLDC?

MIDP

Foundation

Personal

Answer

Correct Answer: MIDP

Note: This Question is unanswered, help us to find answer for this one

14. Which of the following statements are correct regarding Xlet application programming model?

Xlets must have GUI, whereas standalone application may have or may not have GUI

It is very similar to the applet application programming model

It is possible only to run single Xlet application

The lifecycle of Xlet is init, start, stop and destroy, whereas for stand-alone application there is main and exit only

Answer

Correct Answer: It is very similar to the applet application programming model

Note: This Question is unanswered, help us to find answer for this one

15. Which of the following statements are correct regarding CLDC security?

The J2SE security model is too big to be implemented in J2ME

It defines low-level virtual machine security

It defines high-level virtual machine security

It defines application-level security

Answer

Correct Answer: The J2SE security model is too big to be implemented in J2ME

Note: This Question is unanswered, help us to find answer for this one

16. In J2ME, the approximate number of classes taken from J2SE java.util is:

Answer

Correct Answer: 8

Note: This Question is unanswered, help us to find answer for this one

17. The following are the two statements related to Java Community Process:
Statement X: A Java specification begins life as a Java Community Process
Statement Y: The specifications for Java standard, enterprise and micro platforms are developed under the direction of JCP
Which of the following options is correct?

Statement X is incorrect and Statement Y is correct

Statement X is correct and Statement Y is incorrect

Both Statements X,Y are correct

Both Statements X,Y are incorrect

Answer

Correct Answer: Statement X is incorrect and Statement Y is correct

Note: This Question is unanswered, help us to find answer for this one

18. State whether true or false:
A MIDlet can retrieve its environment properties.

True

False

Answer

Correct Answer: True

Note: This Question is unanswered, help us to find answer for this one

19. Which of the following are not supported by the CLDC 1.1 VM?

Weak references

Float calculations

Threads

Finalization

Answer

Correct Answer: Weak references

Note: This Question is unanswered, help us to find answer for this one

20. The constant to create a modal alert is:

Alert.FOREVER

AlertType.FOREVER

Alert.MODAL

AlertType.ALWAY

Answer

Correct Answer: Alert.FOREVER

Note: This Question is unanswered, help us to find answer for this one

21. Which of the following authmodes can be used to share a RecordStore between multiple MIDlets?

AUTHMODE_ANY

AUTHMODE_SHARED

AUTHMODE_PUBLIC

A RecordStore cannot be shared between multiple MIDlets

Answer

Correct Answer: AUTHMODE_ANY

Note: This Question is unanswered, help us to find answer for this one

22. In J2ME, the approximate number of classes taken from J2SE java.io is:

Answer

Correct Answer: 13

Note: This Question is unanswered, help us to find answer for this one

23. Which of the following capabilities are provided to device manufacturers by embedded Java technology?

A familiar object model based on C++

A rich set of functionality for developers including networking, security, graphics, database, and XML support

Optimizing for devices with no GUI and intermittent networking

A single Platform Support

Answer

Correct Answer: A familiar object model based on C++

Note: This Question is unanswered, help us to find answer for this one

24. Which of the following is a CDC based profiles?

Foundation

PDA

MID

Answer

Correct Answer: Foundation

Note: This Question is unanswered, help us to find answer for this one

25. The callback method that is invoked for a specific item event is _____________.

itemEventFired(ItemEvent)

itemStateChanged(Item)

itemEventFired(Item)

itemStateChanged(ItemEvent ie)

Answer

Correct Answer: itemStateChanged(Item)

Note: This Question is unanswered, help us to find answer for this one

26. For a device to be JTWI MMAPI enabled, it must support:

16 Bit KHz color PCM (video)

16 Bit KHz mono PCM (audio)

8 Bit KHz mono PCM (audio)

8 Bit KHz color PCM (video)

Answer

Correct Answer: 8 Bit KHz mono PCM (audio)

Note: This Question is unanswered, help us to find answer for this one

27. Which of the following are a part of the CLDC expert group?

Nokia

Motorola

Sony

Ericsson

Symbian

All of the above

Only a, b and e

Answer

Correct Answer: All of the above

Note: This Question is unanswered, help us to find answer for this one

28. Which of the following in CLDC is not derived from J2SE?

Vector

Stack

Hashtable

ArrayList

Enumeration

Answer

Correct Answer: ArrayList

Note: This Question is unanswered, help us to find answer for this one

29. Which of the following packages constitute the Java ME?

JCP

Configuration

Profiles

Optional packages

Answer

Correct Answer: Configuration

Note: This Question is unanswered, help us to find answer for this one

30. Which of the following devices is served by CDC?

PDAs and Communicators

Phones and Pagers

Smart Cards

Embedded Devices

Answer

Correct Answer: PDAs and Communicators

Note: This Question is unanswered, help us to find answer for this one

31. Which of the following is not addressed by MIDP?

Display toolkit and user input methods

Messaging

Security and networking over wireless network connections

Persistent data storage

All of the above are addressed

Answer

Correct Answer: All of the above are addressed

Note: This Question is unanswered, help us to find answer for this one

32. What will happen on attempting to compile and run the following code?
public class ERMidlet extends MIDlet implements CommandListener, Runnable
{
        private Display mDisplay;
        private Form myForm;
        private Command exitCommand;
        private StringItem myString;

        ERMidlet()
        {
                myForm = new Form("Expert Rating Exam");
                exitCommand = new Command("Exit",Command.EXIT, 0);
                myString = new StringItem("15");
                myForm.append(myString);

                myForm.addCommand(exitCommand);
                myForm.setCommandListener(this);

        }

        public void startApp()
        {
                mDisplay = Display.getDisplay(this);
                mDisplay.setCurrent(myForm);
        }

        public void commandAction (Command c, Displayable s)
        {
                destroyApp(false);
                notifyDestroyed();
        }

        public void run()
        {
        }

        public void pauseApp()
        {
        }

        public void destroyApp(boolean unconditional)
        {
        }

It will display 15 on the devices screen

The code will not compile

The code will compile but will throw a runtime exception

It will not display anything

Answer

Correct Answer: It will display 15 on the devices screen

Note: This Question is unanswered, help us to find answer for this one

33. According to JTWI, what is the standard size for a MIDlet jar file?

32KB

128KB

64KB

16KB

Answer

Correct Answer: 64KB

Note: This Question is unanswered, help us to find answer for this one

34. Which of the following functions fall under the scope of J2ME profiles?

Application installation and life-cycle management

Event Handling

Database Support

High-level Application Model

User Interface Support

All of the above

Answer

Correct Answer: All of the above

Note: This Question is unanswered, help us to find answer for this one

35. The RecordStore can be shared among multiple MIDlets.

True

False

Answer

Correct Answer: True

Note: This Question is unanswered, help us to find answer for this one

36. Which of the following devices is served by CLDC?

PDAs and Communicators

Phones and Pagers

Embedded Devices

Answer

Correct Answer: Phones and Pagers

Note: This Question is unanswered, help us to find answer for this one

37. Which of the following is not a characteristic features of the target devices of CDLC?

They have 128KB to 512KB of total memory

They support the complete JVM specification

They are often battery powered

They are network enabled

Answer

Correct Answer: They support the complete JVM specification

Note: This Question is unanswered, help us to find answer for this one

38. The MIDlet permission is defined in a JAD file using __________.

Microedition-Permissions

MIDP-Permissions

Midlet-Permissions

MIDlet-Configuration

Answer

Correct Answer: Midlet-Permissions

Note: This Question is unanswered, help us to find answer for this one

39. Which of the following is designed for multi-processor enterprise server environments that require maximum program execution speed, 64-bit support and very large memory heaps?

CDC HotSpot Implementation

CLDC HotSpot Implementation

Java HotSpot Client

Java HotSpot Server

Answer

Correct Answer: Java HotSpot Server

Note: This Question is unanswered, help us to find answer for this one

40. Which of the following statements is correct regarding RecordStores?

A call to RecordStore.deleteRecord will allow the recordID to be reused

When updating a record, another user can update the same record at the same time

All RecordStore operations are atomic, synchronized, and serialized

Answer

Correct Answer: All RecordStore operations are atomic, synchronized, and serialized

Note: This Question is unanswered, help us to find answer for this one

41. Which of the following profiles give full AWT and applet support?

Personal

Foundation

RMI

All of the above

Answer

Correct Answer: Personal

Note: This Question is unanswered, help us to find answer for this one

42. Which of the following are the optional packages available with CDC?

RMI Optional Package

JDBC Optional Package

Multimedia Optional Package

Answer

Correct Answer: RMI Optional Package

Note: This Question is unanswered, help us to find answer for this one

43. An attribute is defined in both JAD and MIDlet JAR files. Which one will take precedence over the other?

The same attributes cannot be specified in both the files

JAR file

JAD file

Answer

Correct Answer: JAD file

Note: This Question is unanswered, help us to find answer for this one

44. Which of the following statements with respect to Java ME profiles is incorrect?

They are defined through the Java Community Process initiative

They are subject to a compatibility test

They are a set of APIs which support a configuration for all devices

They are subsets of two configurations, the Connected Limited Device Configuration (CLDC) and the Connected Device Configuration (CDC)

Answer

Correct Answer: They are a set of APIs which support a configuration for all devices

Note: This Question is unanswered, help us to find answer for this one

45. Which of the following features are absent in CLDC as compared to JVM?

Floating point calculations

Error Handling

Garbage Collection

Object finalization

Answer

Correct Answer: Floating point calculations

Note: This Question is unanswered, help us to find answer for this one

46. Which of the following statements is incorrect regarding the Generic Connection framework?

The central idea is to treat everything as a URL

Protocols are defined by profiles

A new set of classes are defined for CLDC

CLDC defines basic network types and mandates the network protocols

Answer

Correct Answer: CLDC defines basic network types and mandates the network protocols

Note: This Question is unanswered, help us to find answer for this one

47. Which of the following are a part of the CLDC expert group?

Siemens

Samsung

Sharp

Oracle

Fujitsu

All of the above

None of the above

Answer

Correct Answer: All of the above

Note: This Question is unanswered, help us to find answer for this one

48. MIDP specification requires support for which of the following auth schemes?

Digest

Form

Basic

Answer

Correct Answer: Basic

Note: This Question is unanswered, help us to find answer for this one

49. Which of the following is not required for JTWI?

WMA 1.1

CLDC 1.1

MIDP 2.0

MMAPI 1.1

Answer

Correct Answer: MMAPI 1.1

Note: This Question is unanswered, help us to find answer for this one

50. Which of the following is designed for single-processor desktop environments that require faster start-up time and a smaller memory footprint?

CLDC HotSpot Implementation

Java HotSpot Client

Java HotSpot Server

Answer

Correct Answer: Java HotSpot Client

Note: This Question is unanswered, help us to find answer for this one

51. Identify the incorrect statement regarding CLDC:

It enables dynamic downloading of applications and content to small devices

It is a minimum-footprint application development platform for resource constrained connected devices

It enables third-party software development for small devices

It is not standardized through the Java Community Process

Answer

Correct Answer: It is not standardized through the Java Community Process

Note: This Question is unanswered, help us to find answer for this one

52. Which of the following fall under the scope of CLDC?

Core Java Libraries

Profile Configuration

High-level Application Model

User Interface Support

Answer

Correct Answer: Core Java Libraries

Note: This Question is unanswered, help us to find answer for this one

53. Which of the following are Java ME profiles?

MIDP

Foundation

Personal

Vista

Answer

Correct Answer: MIDP

Note: This Question is unanswered, help us to find answer for this one

54. Which of the following methods would be suitable in opening a connection using the Generic Connection framework?

connect(url)

Connector.open(url)

Network.open(url)

conopen(url)

Answer

Correct Answer: Connector.open(url)

Note: This Question is unanswered, help us to find answer for this one

55. Which of the following is true for Technology Compatibility Kit(TCK)?

TCK is applicable in CLDC only

TCKs are developed and licensed by the JSR specification lead

TCK is a test suite that verifies whether an implementation is compliant with a given JSR

Answer

Correct Answer: TCKs are developed and licensed by the JSR specification lead

Note: This Question is unanswered, help us to find answer for this one

56. Which of the following methods are defined as a part of CLDC Internationalization?
1.new InputStreamReader(InputStream)
2.new InputStreamReader( InputStream,String)
3.new OutputStreamWriter(OutputStream)
4.new OutputStreamWriter(OutputStream, String)

1,2

1,3

2,3,4,

1,2,3,4

Answer

Correct Answer: 1,2,3,4

Note: This Question is unanswered, help us to find answer for this one

57. Which of the following migration of codes is possible?

CDC-->CLDC

CLDC-->CDC

MIDP-->CDC

Answer

Correct Answer: CLDC-->CDC

Note: This Question is unanswered, help us to find answer for this one

58. State whether true or false:
Migration of code from J2SE to CDC would be a straight forward process.

True

False

Answer

Correct Answer: True

Note: This Question is unanswered, help us to find answer for this one

59. According to JTWI, what is the standard size for a JAD file?

32KB

128KB

64KB

5KB

Answer

Correct Answer: 5KB

Note: This Question is unanswered, help us to find answer for this one

60. Which of the following image formats is supported by JTWI 1.0?

JPEG and GIF

PNG

TIFF and PNG

PNG and JPEG

Answer

Correct Answer: PNG

Note: This Question is unanswered, help us to find answer for this one

61. Which of the following are not Java ME Configurations?

Connected Device Configuration

Connected Restricted Configuration

Connected Limited Device Configuration

Common Legitimate Device Configuration

Answer

Correct Answer: Connected Restricted Configuration

Note: This Question is unanswered, help us to find answer for this one

62. Which of the following is not the characteristic feature of the target devices of CDC?

They have a minimum of 512KB ROM

They support the complete JVM specification

They are network enabled

They have a minimum of 512KB RAM

Answer

Correct Answer: They have a minimum of 512KB RAM

Note: This Question is unanswered, help us to find answer for this one

63. The version of CLDC in a JAD file can be known by the

MIDlet-Configuration

Microedition-Configuration

MIDP-Configuration

Configuration

Answer

Correct Answer: Microedition-Configuration

Note: This Question is unanswered, help us to find answer for this one

64. Which of the following features would the target devices for CLDC have?

They have a 128KB to 512KB of memory

They are often battery powered

They have a processor speed of 6MHZ-16MHZ

They often have a limited bandwidth network connection (9600)

Answer

Correct Answer: They have a 128KB to 512KB of memory

Note: This Question is unanswered, help us to find answer for this one

65. Which of the following devices is served by CDC?

Internet Screen Phones

Auto Telemetric Systems

Smart Cards

Answer

Correct Answer: Internet Screen Phones

Note: This Question is unanswered, help us to find answer for this one

66. According to JTWI, what is the recommended screen size?

96 x 54 (12 bit color depth)

96 x 54 (1 bit color depth)

125 x 125 (1 bit color depth)

125 x 125 (12 bit color depth)

Answer

Correct Answer: 125 x 125 (12 bit color depth)

Note: This Question is unanswered, help us to find answer for this one

67. Which of the following is used to specify the Push enable MIDlets?

Midlet-Push-<y>

Midlet-enable-<n>

Midlet-Push-<n>

Midlet-enable-<y>

Answer

Correct Answer: Midlet-Push-<n>

Note: This Question is unanswered, help us to find answer for this one

68. Which of the following statements regarding configuration in Java ME is incorrect?

It is defined by the Java Community Process

It is not subjected to compatibility tests

It specifies the minimum Java libraries required for a particular set of devices

It specifies the minimum virtual machine capabilities required for a particular set of devices

Answer

Correct Answer: It is not subjected to compatibility tests

Note: This Question is unanswered, help us to find answer for this one

69. SMS Push is not required for JTWI.

True

False

Answer

Correct Answer: False

Note: This Question is unanswered, help us to find answer for this one

70. Which of the following is designed for resource-constrained devices like consumer products and embedded devices?

CDC HotSpot Implementation

CLDC HotSpot Implementation

Java HotSpot Client

Java HotSpot Server

Answer

Correct Answer: CDC HotSpot Implementation

Note: This Question is unanswered, help us to find answer for this one

71. According to JTWI, what is the recommended size for a heap?

256KB

128KB

64KB

16KB

Answer

Correct Answer: 256KB

Note: This Question is unanswered, help us to find answer for this one

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Basic Java ME (Java Platform, Micro Edition) MCQ

1. Which of the following are a part of the CLDC expert group?

2. Which of the following are a part of the CLDC expert group?

3. The minimum number of threads supported by JTWI complaint implementations are:

4. The CLDC properties are defined in:

5. The CLDC specific classes are defined in a package called:

6. Which of the following form a part of CLDC?

7. The default mode for an open connection is:

8. Mids server should only download data which has a MIME type of:

9. What would be the values for boxes 1 and 2 respectively in the given Generic Framework figure?

10. Which of the following is designed for very small memory scenarios, typically 128 KB to 512 KB for the Java application environment?

11. Which of the following could be the reasons for the introduction of the Generic Connection framework?

13. Which of the following profile is supported by CLDC?

14. Which of the following statements are correct regarding Xlet application programming model?

15. Which of the following statements are correct regarding CLDC security?

16. In J2ME, the approximate number of classes taken from J2SE java.util is:

18. State whether true or false:A MIDlet can retrieve its environment properties.

19. Which of the following are not supported by the CLDC 1.1 VM?

20. The constant to create a modal alert is:

21. Which of the following authmodes can be used to share a RecordStore between multiple MIDlets?

22. In J2ME, the approximate number of classes taken from J2SE java.io is:

23. Which of the following capabilities are provided to device manufacturers by embedded Java technology?

24. Which of the following is a CDC based profiles?

25. The callback method that is invoked for a specific item event is _____________.

26. For a device to be JTWI MMAPI enabled, it must support:

27. Which of the following are a part of the CLDC expert group?

28. Which of the following in CLDC is not derived from J2SE?

29. Which of the following packages constitute the Java ME?

30. Which of the following devices is served by CDC?

31. Which of the following is not addressed by MIDP?

33. According to JTWI, what is the standard size for a MIDlet jar file?

34. Which of the following functions fall under the scope of J2ME profiles?

35. The RecordStore can be shared among multiple MIDlets.

36. Which of the following devices is served by CLDC?

37. Which of the following is not a characteristic features of the target devices of CDLC?

38. The MIDlet permission is defined in a JAD file using __________.

39. Which of the following is designed for multi-processor enterprise server environments that require maximum program execution speed, 64-bit support and very large memory heaps?

40. Which of the following statements is correct regarding RecordStores?

41. Which of the following profiles give full AWT and applet support?

42. Which of the following are the optional packages available with CDC?

43. An attribute is defined in both JAD and MIDlet JAR files. Which one will take precedence over the other?

44. Which of the following statements with respect to Java ME profiles is incorrect?

45. Which of the following features are absent in CLDC as compared to JVM?

46. Which of the following statements is incorrect regarding the Generic Connection framework?

47. Which of the following are a part of the CLDC expert group?

48. MIDP specification requires support for which of the following auth schemes?

49. Which of the following is not required for JTWI?

50. Which of the following is designed for single-processor desktop environments that require faster start-up time and a smaller memory footprint?

51. Identify the incorrect statement regarding CLDC:

52. Which of the following fall under the scope of CLDC?

53. Which of the following are Java ME profiles?

54. Which of the following methods would be suitable in opening a connection using the Generic Connection framework?

55. Which of the following is true for Technology Compatibility Kit(TCK)?

56. Which of the following methods are defined as a part of CLDC Internationalization?1.new InputStreamReader(InputStream)2.new InputStreamReader( InputStream,String)3.new OutputStreamWriter(OutputStream)4.new OutputStreamWriter(OutputStream, String)

57. Which of the following migration of codes is possible?

58. State whether true or false:Migration of code from J2SE to CDC would be a straight forward process.

59. According to JTWI, what is the standard size for a JAD file?

60. Which of the following image formats is supported by JTWI 1.0?

61. Which of the following are not Java ME Configurations?

62. Which of the following is not the characteristic feature of the target devices of CDC?

63. The version of CLDC in a JAD file can be known by the

64. Which of the following features would the target devices for CLDC have?

65. Which of the following devices is served by CDC?

66. According to JTWI, what is the recommended screen size?

67. Which of the following is used to specify the Push enable MIDlets?

68. Which of the following statements regarding configuration in Java ME is incorrect?

69. SMS Push is not required for JTWI.

70. Which of the following is designed for resource-constrained devices like consumer products and embedded devices?

71. According to JTWI, what is the recommended size for a heap?

18. State whether true or false:
A MIDlet can retrieve its environment properties.

56. Which of the following methods are defined as a part of CLDC Internationalization?
1.new InputStreamReader(InputStream)
2.new InputStreamReader( InputStream,String)
3.new OutputStreamWriter(OutputStream)
4.new OutputStreamWriter(OutputStream, String)

58. State whether true or false:
Migration of code from J2SE to CDC would be a straight forward process.