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

1. Given the MIDlet code:
1 0. //...
2 0. try {
2 1. Connection conn = Connector.open("http://www.sun.com");
2 2. InputStream is = conn.getInputStream();
2 3. //...
3 0. } catch (IOException e) {
3 1. //...
4 0. }
Which is true?

A) The system returns a valid InputStream for reading.
B) The system returns a null InputStream.
C) An exception is thrown at runtime.
D) Compilation fails.

2. Given:
1 0. //...
2 0. try {
2 1. Hashtable table = new Hashtable();
2 2. for (;;) table.put(new Object(), new Object());
2 3. } catch (OutOfMemoryException e) {
2 4. Display.getDisplay().setCurrent(new Alert("Out of Memory!"));
2 5. }
2 6. //...
Which is true?

A) An exception is thrown at runtime but there is no guarantee an alert will be shown to the user.
B) The program hangs at line 22.
C) Out of Memory! is printed to the system console.
D) Compilation fails.

3. A MIDlet suite running on a GSM phone successfully receives an SMS text message msg from another GSM phone. The suite is using a valid SMS MessageConnection object conn opened in server mode.
The suite tries to respond back using:
msg.setPayloadText("thank you!");
conn.send(msg);
Which is true?

A) The code can succeed because the connection object contains an address for sending a response.
B) The code always fails because the message object is missing an address for sending a response.
C) The code always fails because the connection object is missing an address for sending a response.
D) The code can succeed because the message object contains an address for sending a response.

4. Given:
DataInputStream incoming
Connector.openDataInputStream("sms://+3125551234:3434");
Which is true?

A) Port numbers are NOT allowed in SMS URLs.
B) The + in the URL is positioned incorrectly.
C) The port number indicated is a protected SMS port.
D) MessageConnection does NOT support InputStream objects.

5. Which creates a new record store of type javax.microedition.rms.RecordStore that can be shared between MIDlet suites?

A) openRecordStore("cust", false, AUTHMODE_SHARED, false);
B) openRecordStore("cust", false, AUTHMODE_ANY, false);
C) openRecordStore("cust", true, AUTHMODE_SHARED, false);
D) openRecordStore("cust", true, AUTHMODE_ANY, false);

Solutions: