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

1. Which three are top level interfaces in the javax.wireless.messaging package? (Choose three.)

A) Datagram
B) MessageConnection
C) MessageListener
D) MessageHandler
E) Connector
F) Message

2. Which is used to retrieve the version of MIDP a device has implemented?

A) System.getAppProperty("microedition.platform")
B) System.getAppProperty("microedition.profiles")
C) System.getProperty("microedition.configuration")
D) System.getProperty("microedition.platform")
E) System.getProperty("microedition.profiles")

3. Which two are true regarding the interaction of the Application Management Software (AMS) and a MIDlet when a connection notification is pushed to a device? (Choose two.)

A) If the notification is for a datagram, the AMS must guarantee that the datagram is made available to the MIDlet after the MIDlet is invoked. However, additional datagrams could be lost during the time required to start the MIDlet.
B) If the notification is for a socket, the connection must be provided to the MIDlet.
However the server side of the connection may timeout before the MIDlet actually starts.
C) There are no guarantees provided by the AMS as to the state of a datagram or socket connection. The connection notification is intended to start the MIDlet to handle subsequent connections.
D) If the AMS starts a MIDlet in response to an inbound connection, the MIDlet must defer the responsibility of closing the connection to the AMS to prevent an IOException from occurring.

4. Given:
5 0. class MyGameCanvas extends Canvas {
5 1. //...
6 0. public MyGameCanvas() {
6 1. int width1 = getWidth();
6 2. int height1 = getHeight();
6 3. //...
7 0. setFullScreenMode(true);
7 1. //...
8 0. int width2 = getWidth();
8 1. int height2 = getHeight();
8 2. //...
9 0. }
What is true about width1, height1 and width2, height2?

A) width1 is always equal to width2.
B) The system tries to provide maximum visible area to the MIDlet and these dimensions are width2, height2.
C) height1 is always equal to height2.
D) The call to setFullScreenMode() is ignored because the dimensions have already been set.

5. Which is true when using multiple threads to access a record store?

A) You CANNOT access a record store with multiple threads.
B) The implementation coordinates access, ensuring that record stores will NOT be corrupted.
C) You must lock a record store prior to access.
D) You must coordinate access to a record store to prevent data corruption.

Solutions: