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Oracle 1Z0-869 Exam Syllabus Topics:

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

1. Which three statements are true regarding the handling of wireless connections? (Choose three.)

A) The connection could unexpectedly terminate while processing the input or output streams.
B) Performing network operations on the same thread used by the display is likely to block refreshes of the display until the network operations complete.
C) Devices can only support one HttpConnection at a time; therefore, network access from multiple threads must be serialized.
D) A network connection could interfere with other services on the device, such as the ability to receive phone calls or SMS on a phone.
E) Network connections should never be performed on a separate thread, so problems can be handled quickly.

2. Given a class named MyCanvas, which three CANNOT be used if MyCanvas is a direct subclass of Canvas? (Choose three.)

A) keyStates = getKeyStates();
if ((keyStates & LEFT_PRESSED) != 0) { }
B) flushGraphics();
C) public MyCanvas(boolean t) {
super(true);
}
D) gameAction = getGameAction(keyCode) { }
E) isDoubleBuffered();
F) Sprite s = new Sprite(anImage, 20,20);

3. Which two can a developer use to create a Timer that will go off in 5 seconds, repeating every 3 seconds? (Choose two.)

A) timer.schedule(timerTask, 5000, 3000);
B) timer.schedule(timerTask, 5, 3);
C) timer.scheduleAtFixedRate(timerTask, 5, 3);
D) timer.schedule(timerTask, new Date().getTime() + 5000, 3000);
E) timer.scheduleAtFixedRate(timerTask, 5000, 3000);

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

5. Given:
1 5. String addr = "sms://+14155557296";
1 6. MessageConnection conn
1 7. = (MessageConnection) Connector.open(addr);
1 8. // insert code here
1 9. message.setPayloadData(imageBytes);
Assume imageBytes is a valid byte array.
Which statement, inserted at line 18, causes the rest of the code fragment to compile correctly?

A) BinaryMessage message = new BinaryMessage();
B) Message message
conn.newMessage(MessageConnection.BINARY_MESSAGE);
C) BinaryMessage message = (BinaryMessage)
conn.newMessage(MessageConnection.BINARY_MESSAGE);
D) Message message = new BinaryMessage();

Solutions: