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Oracle 1Z0-869 Exam Syllabus Topics:

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

1. How would a MIDlet that uses a GameCanvas efficiently update only a small region of the screen, from the data in the off-screen buffer?

A) Pixels that are NOT to be flushed should be made transparent.
B) call flushGraphics(int, int, int, int) that specifies the region to be flushed
C) call serviceRepaints() and set a clip region on the Graphics object in paint()
D) write extra code to coalesce the flushGraphics() calls over many loops into one call

2. Assume a device supports datagrams and a MIDlet has permission to use datagram connections. Which two are true? (Choose two.)

A) Push registration can fail because the device does NOT support the use of datagrams by the PushRegistry.
B) Push registration can fail if there is a push registration conflict, but the user must be prompted as to how to resolve the problem.
C) Push registration can fail if the allowed sender filter specified is *, which poses a security risk to the device.
D) Push registration can fail if another application has already reserved the connection on the device.

3. Which interaction generates an application event in a MIDlet that uses only high-level APIs?

A) making a choice in a multiple choice List
B) navigation
C) responding to a command
D) scrolling

4. Click the Exhibit button.
The red collision rectangle around each Sprite in the image is NOT part of the actual image. The two Sprite objects intersect in the application precisely as shown.
Which two are true? (Choose two.)

A) For the two Sprite objects to be considered in collision, collidesWith() must be invoked on both objects.
B) For the two Sprite objects to be considered in collision, each Sprite must have no more than one frame.
C) If Sprite 1 is being tested for collision with Sprite 2 using pixel-level collision detection, the two Sprite objects will NOT be in collision.
D) The most efficient way to detect collision is to use collision detection based solely on the collision rectangles.

5. DRAG DROP
Click the Task button.
Place each code snippet where it belongs.

Solutions: