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

1. Which three are basic interface types addressed by the Generic Connection Framework?
(Choose three.)

A) telephony-oriented mechanism
B) location-oriented mechanism
C) circuit-oriented mechanism
D) basic serial input connection
E) basic serial output connection

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

3. Given:
10. //...
2 0. int[] foo = new int[10000];
2 1. foo = null;
2 2. System.gc();
2 3. //...
Which is true once the program execution reaches line 23?

A) The garbage collector CANNOT reclaim the memory allocated to foo because the reference is nulled out.
B) The garbage collector is triggered but there are no guarantees that any memory has been reclaimed.
C) The garbage collector is triggered and memory is guaranteed to be reclaimed.
D) The garbage collector suspends the program until more memory becomes available.

4. Which two are true about JTWI devices using SMS? (Choose two.)

A) Java applications are restricted to using port numbers between 2000 and 9207.
B) A message which is too big to be sent in a single segment is NOT guaranteed to have its segments arrive at the application in the order in which they were sent.
C) Multiple messages sent from point A to point B are NOT guaranteed to be delivered in the order in which they were sent.
D) The payload for an SMS message can use the BinaryMessage interface.
E) The payload for an SMS message segment CANNOT exceed 140 bytes.

5. What is the result when a user tries to update a signed, installed MIDlet suite with an unsigned MIDlet suite with the same MIDlet-Name?

A) The signed MIDlet suite is left installed, even if the unsigned MIDlet suite has a newer MIDlet-Version.
B) The device blocks all access to any MIDlets.
C) The unsigned MIDlet suite is installed if it has a newer MIDlet-Version.
D) The MIDlet suite with the newer MIDlet-Version is installed.

Solutions: