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Oracle 1Z0-869 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| APIs and Specifications | - Media Using MIDP 2.0 and MMAPI 1.1 - Networking - Wireless Messaging API 1.1 - Security (CLDC and MIDP) |
| Java ME Technologies | - MIDP Game API - CLDC 1.0 and 1.1 - MIDP Persistent Storage - Push Registry - MIDP User Interface API |
| JTWI and Wireless Application Overview | - JTWI (JSR 185) and Overview of JTWI-Compliant Wireless Applications |
Oracle Java Mobile Edition 1 Mobile Application Developer Certified Professional Sample Questions:
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, com.example.EmailMIDlet, *
- C. MIDlet-Push-1: socket://:79, EmailMIDlet, *
- D. MIDlet-Push-1: socket://:79, MIDlet-1, *
Correct Answer: B 🗳️
Given the MIDlet code:
11. DatagramConnection dgc
(DatagramConnection)Connector.open("datagram://:444");
1 2. Datagram datagram = dgc.newDatagram(20);
1 3. dgc.receive(datagram);
1 4. byte[] data = datagram.getData();
1 5. String s = new String(data);
1 6. list.append(s, null);
1 7. System.out.println("Datagram received: " + s);
Which two are true regarding the portability of the code between devices? (Choose two.)
- A. Installation will fail on devices that do not support datagrams.
- B. Datagrams may not be supported on all platforms.
- C. The code is portable because all the classes and interfaces used are defined in the CLDC.
- D. Port 444 may be restricted or ignored by some MIDP implementations.
Correct Answer: B,D 🗳️
Given:
1 0. //...
2 0. int note = ToneControl.C4;
2 1. for (int i=0; i<200; i++) {
2 2. Manager.playTone(note += 2, 100, 10);
2 3. }
2 4. System.out.println("done");
2 5. //...
Which is true?
- A. Compilation fails.
- B. An IllegalArgumentException is thrown at runtime.
- C. A tone sequence of rising pitch plays and done is printed.
- D. The program hangs in the for loop.
Correct Answer: B 🗳️
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 there is a push registration conflict, but the user must be prompted as to how to resolve the problem.
- C. Push registration can fail because the device does NOT support the use of datagrams by the PushRegistry.
- D. Push registration can fail if the allowed sender filter specified is *, which poses a security risk to the device.
Correct Answer: A,C 🗳️
Which two are true about the javax.wireless.messaging.MessageConnection interface?
(Choose two.)
- A. Threads that are waiting to receive messages must be blocking threads.
- B. It provides methods to create Connector objects.
- C. This interface is intended for all wireless messaging protocols.
- D. When creating a client mode message, a string that identifies an endpoint on the local host should be passed to Connector.open().
- E. An application can have both client and server mode MessageConnection instances open simultaneously.
Correct Answer: C,E 🗳️
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