Oracle Java Mobile Edition 1 Mobile Application Developer Certified Professional : 1Z0-869

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Oracle 1Z0-869 Exam Syllabus Topics:

Oracle Java Mobile Edition 1 Mobile Application Developer Certified Professional Sample Questions:

1. Given:
1 0. Player p = Manager.createPlayer(Manager.TONE_DEVICE_LOCATOR);
1 1. VolumeControl vc = p.getVolumeControl();
1 2. vc.setLevel(42);
1 3. vc.setMute(true);
1 4. System.out.println(vc.getLevel());
Which is printed to the console?

A) -1
B) null
C) 42
D) 0

2. Given:
a JAR containing a MIDlet named TesterMIDlet
a JAD with this content: CertificationExam:
Sun Certified Mobile Application DeveloperMIDlet-1: TesterMIDlet, ,
certification.TesterMIDlet MIDlet-Jar-Size: 2038 MIDlet-Jar-URL: Certification.jar MIDlet- Name: Certification MIDlet-Vendor: A Testing Company MIDlet-Version: 1.0 MicroEdition- Configuration: CLDC-1.0 MicroEdition-Profile: MIDP-2.0 This MIDlet needs to get the property with the key CertificationExam defined in the JAD.
This needs to be assigned to a String ExamName from within the MIDlet.startApp() method.
What is the correct way to accomplish this?

A) String ExamName = System.getProperty("MIDlet-CertificationExam");
B) String ExamName = System.getProperty("CertificationExam");
C) String ExamName = this.getAppProperty("CertificationExam");
D) String ExamName = this.getAppProperty("MIDlet-CertificationExam");

3. A MIDP 2.0 compliant device creates an HTTP connection to a server that supports HTTP
1.1. Which is true?

A) The device definitely does NOT support HTTP 1.1.
B) The device definitely supports HTTP 1.1.
C) There is no such thing as a 1.1 version of HTTP.
D) The device may or may NOT support HTTP 1.1.

4. A JTWI device has a working socket implementation. A MIDlet requests permission to use socket connections on this device using the attribute MIDlet-Permissions-Opt, but is denied permission.
Given:
2 0. public void connect() {
2 1. try {
2 2. String addr = "socket://host.com:79";
2 3. SocketConnection sc;
2 4. sc = (SocketConnection) Connector.open(addr);
2 5. sc.setSocketOption(SocketConnection.LINGER, 5);
2 6. InputStream is = sc.openInputStream();
2 7. OutputStream os = sc.openOutputStream();
2 8. os.write("\\r\\n".getBytes());
2 9. int ch = is.read();
3 0. // ...
3 5. } catch (IOException ioe) {
3 6. // ...
4 0. }
4 1. }
Which is true assuming that the argument to Connector.open() points to a valid destination, and the device has resources to create new socket connections?

A) If connect() executes, a SecurityException is thrown at runtime at line 24.
B) If connect() executes, a SecurityException is thrown at runtime at line 26.
C) If connect() executes, a SecurityException is thrown at runtime at line 28.
D) If connect() executes, a ConnectionNotFoundException is thrown at runtime at line 24.
E) The device disallows the MIDlet to be installed.

5. Manager.createPlayer(..) may involve synchronous blocking I/O operations, possibly blocking execution for an indefinite amount of time. Which is the most efficient way to create a Player object and receive the events it generates?

A) Ensure System.gc() is called before creating the Player.
B) Create the Player in the current thread and listen for events in a separate thread.
C) Create the Player from an InputStream, possibly after copying data into memory.
D) Create the Player in a separate thread from the user interface, then create a PlayerListener that receives events from this Player.

Solutions: