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

1. Given the MIDlet code:
1 5. boolean main_called;
1 6. public static void main(String args[]) {
1 7. main_called = true;
1 8. }
1 9. public void startApp() {
2 0. int a;
2 1. if (true == main_called) {
2 2. a = 1;
2 3. } else {
2 4. a = 5;
2 5. }
2 6. }
What is the result?

A) The source compiles. The MIDlet is started and a = 1.
B) The source compiles. The MIDlet is started and a = 5.
C) The source compiles. The application management system will not load this MIDlet.
D) An error occurs at compile time.
E) A compilation error occurs when compiling this source.

2. wav is a content type supported on a device that executes:
1 0. Player p;
1 1. p = Manager.createPlayer("http://foobar.sun.com/sound.wav");
1 2. p.prefetch();
Which is true?

A) sound.wav is played on the device.
B) The result is device-dependent.
C) An exception is generated at runtime.
D) No exception is thrown at runtime. No sound is played.

3. 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.

4. Which two are true? (Choose two.)

A) Synchronous painting to the device display is possible with GameCanvas.
B) paint() is never called for GameCanvas subclasses.
C) Canvas.serviceRepaints() and Canvas.callSerially() can be used to create a constant frame-rate animation loop.
D) GameCanvas always needs a separate thread to draw anything on the screen.

5. What is guaranteed by the class file verifier?

A) It checks for attempted network access.
B) It checks that a given program is a valid Java application.
C) It checks for attempted native library access.
D) It checks for external resource access.

Solutions: