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

1. Assume a particular JTWI phone supports server socket connections. A MIDlet running on the phone attempts to register a connection using:
PushRegistry.registerConnection(connection, midlet, filter); Assume connection, midlet, and filter are NOT null. The statement is executed and throws a ConnectionNotFoundException. What causes the exception?

A) The requested connection is already registered.
B) The phone does NOT support push connections using server sockets.
C) The syntax of connection is invalid.
D) The specified MIDlet does NOT exist.

2. DRAG DROP
Click the Task button.
Place each code snippet where it belongs.

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

4. Assume a device supports datagrams and a MIDlet has permission to use datagram connections. Which two are true? (Choose two.)

A) Push registration can fail if another application has already reserved the connection on the device.
B) Push registration can fail if the allowed sender filter specified is *, which poses a security risk to the device.
C) Push registration can fail because the device does NOT support the use of datagrams by the PushRegistry.
D) Push registration can fail if there is a push registration conflict, but the user must be prompted as to how to resolve the problem.

5. A MIDlet suite has the application descriptor fragment:
MIDlet-1: E-mail, email.png, com.example.EmailMIDlet
The MIDlet suite has the necessary permissions to use the PushRegistry.
What line does the application descriptor need to register the MIDlet suite for socket push connections on port 79?

A) MIDlet-Push-1: socket://:79, E-mail, *
B) MIDlet-Push-1: socket://:79, EmailMIDlet, *
C) MIDlet-Push-1: socket://:79, MIDlet-1, *
D) MIDlet-Push-1: socket://:79, com.example.EmailMIDlet, *

Solutions: