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Oracle 1Z0-869 Exam Syllabus Topics:

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

1. There are different variants of opening a socket connection with the Generic Connection Framework. Which three are valid? (Choose three.)

A) Connection conn = Connector.open("socket://java.sun.com");
B) Connection conn = Connector.open("socket://");
C) Connection conn = Connector.open("socket://java.sun.com:80");
D) Connection conn = Connector.open("socket");
E) Connection conn = Connector.open("socket::java.sun.com");
F) Connection conn = Connector.open("socket:80://java.sun.com");

2. Given:
1 0. public class ExampleMIDlet extends MIDlet {
1 1. //...
2 0. public ExampleMIDlet() {
2 1. Hashtable cache = new Hashtable();
2 2. synchronized (cache) {
2 3. while (cache.isEmpty()) {
2 4. try {cache.wait();}
2 5. catch (InterruptedException e) {/* handle me */}
2 6. }
2 7. }
2 8. }
2 9. //...
4 0. }
Which two are true? (Choose two.)

A) The program hangs.
B) An unchecked exception is thrown at runtime.
C) The program is in conflict with recommendations of the MIDP specification.
D) An IllegalMonitorStateException is thrown at runtime.

3. Given:
RecordStore rs = null;
static final String REC_STORE = "appdata"; And, the record store does NOT already exist.
Which is the correct way to open the record store, requesting the record store be created?

A) rs = RecordStore.createRecordStore(REC_STORE, 1);
B) rs = RecordStore.openRecordStore(REC_STORE);
C) rs = RecordStore.createRecordStore(REC_STORE, true);
D) rs = RecordStore.createRecordStore(REC_STORE);
E) rs = RecordStore.openRecordStore(REC_STORE, true);
F) rs = RecordStore.openRecordStore(REC_STORE, 1);

4. 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 serviceRepaints() and set a clip region on the Graphics object in paint()
C) call flushGraphics(int, int, int, int) that specifies the region to be flushed
D) write extra code to coalesce the flushGraphics() calls over many loops into one call

5. What is the area that the developer must paint when using CustomItem?

A) CustomItem is limited to painting in the content area.
B) CustomItem size is always honored by the system. Once created, the CustomItem always has this area to paint in.
C) CustomItem must paint the content area, its labels, and its border.
D) The areas are unlimited. CustomItem may paint inside any area on the screen.

Solutions: