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Oracle 1Z0-869 Exam Syllabus Topics:

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

1. A MIDP 2.0 developer is building a game using the MIDP game API that requires user control over the direction of a Sprite within a GameCanvas. The developer wants to keep performance high and reduce memory use. Which two fulfill the goals? (Choose two.)

A) in the GameCanvas object, use actual key codes rather than mapped game action constants
B) implement keyPressed(), keyReleased(), and keyRepeated()
C) suppress key events for the GameCanvas object
D) poll for the current state of user key input in a loop, using getKeyStates()

2. Given:
MIDlet-Push-1: datagram://:444, com.fooworks.PushExample, *
MIDlet-Push-2: datagram://:555, com.fooworks.PushExample, *
are statically registered push connections and given:
1 1. protected void startApp() {
1 2. String[] connections = PushRegistry.listConnections(true);
1 3. if(connections.length == 0) {
1 4. connections = PushRegistry.listConnections(false);
1 5. for (int i=0; i < connections.length; i++) {
1 6. new DatagramHandler(connections[i]).start();
1 7. }
1 8. } else {
1 9. for (int i=0; i < connections.length; i++) {
2 0. new DatagramHandler(connections[i]).start();
2 1. }
2 2. }
2 3. }
Which two identify what will go wrong if the code is invoked by the Application Management Software in response to an inbound connection notification? (Choose two.)

A) Duplicate DatagramHandler objects are created if the MIDlet is paused and then resumed.
B) The first inbound datagram is ignored, all subsequent datagrams are handled by DatagramHandler.
C) An IOException is thrown if there are no active connections.
D) Datagrams for the active connection are handled, but any datagrams sent to the other port are missed.
E) The first inbound datagram is handled, but all other datagrams are missed.

3. Which two are true regarding error handling for classes that exist in both CLDC and J2SE?
(Choose two.)

A) The set of error classes is essentially the same in CLDC and J2SE.
B) There is no correspondence between the errors defined by CLDC and J2SE because the needs of CLDC and J2SE are so different.
C) The set of error classes is much reduced in CLDC to help reduce the overhead of the JVM.
D) If a class throws an error in CLDC, it should throw the same error as in J2SE or its nearest superclass.

4. DRAG DROP
Click the Task button.
Place the correct class within the hierarchy to reflect the class inheritance structure for the MIDP 2.0 user interface API. Not all classes are shown.

5. Which two are true about record store listeners? (Choose two.)

A) To listen for all events, three listeners must be registered.
B) A record store can have more than one registered listener.
C) Listeners are notified if a record store is deleted.
D) When a record store is closed, listeners are removed.
E) A record store can have only one registered listener.

Solutions: