J2ME Online Test3

Thank you very much for taking test

Test your caliber

1. Which class would you use to write applications to access low-level input events or to issue graphics calls for drawing to the display?
Display	Command
Screen	None of these

2. Which one of the following methods of the MIDlet abstract class must be implemented by a midlet:
initApp, startApp	startApp, destroyApp
initApp, startApp, pauseApp, destroyApp	startApp, pauseApp, destroyApp

3. All MIDP GUI classes are contained in what package?
javax.microedition.gui	javax.microedition.lcd
javax.microedition.lcdui	javax.microedition.display

4. Which of the following techniques can be used for wireless session tracking?
Cookies	URL Rewriting
Hidden Fields	None of the above

5. A midlet is a Java class that extends the abstract class:
javax.microedition.MIDlet	javax.microedition.midlet
javax.microedition.midlet.MIDlet	javax.microedition.midlet.midlet

6. All MIDP implementations are required to support what image format?
GIF	JPG
BMP	PNG

7. The heart of the Generic Connection framework is:
javax.microedition.Connection	javax.microedition.Connector
javax.microedition.StreamConnection	javax.microedition.HttpConnection

8. If a midlet needs to receive high-level events from the implementation, which interface should it implement?
ActionListener	CommandListener
Windows Listener	ChoiceListener

9. A Java virtual machine1 (JVM) supporting CLDC has no support for:
Floating point numbers	Reflection
JNI	All of the above

10. The MIDP user interface API is a subset of the AWT/ Project Swing libraries.
True	False
All of the above	None of the above

11. A midlet is a Java class that extends the abstract class:
javax.microedition.MIDlet	javax.microedition.midlet
javax.microedition.midlet.MIDlet	javax.microedition.midlet.midlet

12. Which one of the following methods of the MIDlet abstract class must be implemented by a midlet:
initApp, startApp	startApp, destroyApp
startApp, pauseApp, destroyApp	initApp, startApp, pauseApp, destroyApp

13. After compiling your midlet, you must process it with a command to ensure that it is valid before use by the Kilo virtual machine (KVM). What is the name of that command?
midp	javac-bootclasspath
preverify	jar

14. A Java Application Descriptor (JAD) file is a text file that is similar to a manifest, except that it is not packaged in a JAR file. Some of the shared attributes that must have identical values are: MIDlet-Name, MIDlet-Version, and MIDlet-Vendor.
The ones in the descriptor override those in the manifest	The ones in the manifest override those in the descriptor
All of the above	None of the above

15. When downloading application descriptors (.jad files) from a web server, the web server must return a MIME type of:
text/vnd.sun.j2me.midp	text/vnd.sun.j2me.jad
text/vnd.sun.j2me.app-descriptor	text/vnd.sun.j2me.midapp

16. A midlet suite is a set of midlets that are packed together into a single JAR file. Midlets within the same suite:
Can share the classes and resources contained in the JAR file	Cannot share the classes and resources contained in the JAR file
All of the above	None of the above

17. Midlets from different suites:
Can interact directly	Cannot interact directly
All of the above	None of the above

18. What is the difference between a configuration (such as the CLDC) and a profile (such as the MIDP)?
a configuration defines the set of class libraries available for a particular domain of devices, and a profile provides I/O and network APIs	a configuration defines a vertical set of classes that a profile can use
a configuration defines a minimum set of class libraries for a wide range of devices, and a profile defines the set of APIs available for a particular family of devices	a profile is the foundation for a configuration

19. All MIDP implementations are required to support what image format?
GIF	JPG
BMP	PNG

20. If a midlet needs to receive high-level events from the implementation, which interface should it implement?
ActionListener	CommandListener
Windows Listener	ChoiceListener