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

1. 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.

2. Given the MIDlet code:
7 . public void exitApp() {
8 . Runtime rt = Runtime.getRuntime();
9 . rt.exit(0);
1 0. }
What is the result of a call to exitApp()?

A) A SecurityException is thrown at line 9.
B) exitApp() completes execution successfully.
C) Compilation fails because of an error on line 9.
D) Compilation fails because of an error on line 8.

3. Given the MIDlet code:
1 1. public void startApp() {
1 2. Form f = new Form("hello");
1 3. Display.getDisplay(this).setCurrent(f);
1 4. System.gc();
1 5. System.exit(0);
1 6. f.append("foo");
1 7. }
What is the result?

A) The application runs without exception, but foo is not printed.
B) The application runs, but throws an exception at runtime.
C) The application runs, and foo prints to the current display.
D) The application runs, but line 15 is ignored.
E) Compilation fails.

4. Which is true about CLDC support for accessing system property information?

A) CLDC supports a subset of java.util.Properties and also provides additional property information using System.getProperty().
B) Full support for java.util.Properties is available within CLDC.
C) Property information is available in CLDC using System.getProperty().
D) CLDC supports a subset of java.util.Properties.

5. A mobile application developer is trying to reduce the memory footprint of a game using the MIDP Game API? Which is a valid approach?

A) reuse a single GameCanvas throughout the application
B) implement keyPressed() and keyReleased()
C) use a single bitmap background rather than multiple tiles
D) restrict the number of frames per Sprite to one

Solutions: