Exam Name: Java Mobile Edition 1 Mobile Application Developer Certified Professional Exam
Certification Provider: Oracle
Corresponding Certification: Java Technology
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Oracle 1Z0-869 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: MIDlet Development | - MIDlet lifecycle - User interface components and event handling |
| Topic 2: Packaging and Deployment | - Deployment to mobile devices - JAR/JAD packaging |
| Topic 3: Security Model | - Sandbox model and permissions - Signed MIDlets and trust levels |
| Topic 4: Java ME Architecture and Fundamentals | - CLDC (Connected Limited Device Configuration) - MIDP (Mobile Information Device Profile) - Java ME platform architecture overview |
| Topic 5: Data Storage and Persistence | - Record Management System (RMS) |
| Topic 6: Networking and Communication | - HTTP/HTTPS connections in Java ME - Generic Connection Framework (GCF) |
Oracle Java Mobile Edition 1 Mobile Application Developer Certified Professional Sample Questions:
Given:
30. public boolean X(byte[] Y) throws IllegalArgumentException {
31. ByteArrayInputStream bais = new ByteArrayInputStream(arg);
32. DataInputStream dis = new DataInputStream(bais);
33. String type = null; 34. try {type = dis.readUTF();}
3 5. catch (Exception e) { }
3 6. return(Z);
3 7. }
Which substitutions for X, Y, and Z in the code create a valid implementation of RecordFilter that matches records whose type is NOT deleted?
- A. X is match
Y is arg
Z is type.equals("deleted") - B. X is matches
Y is arg
Z is !type.equals("deleted") - C. X is matches
Y is type
Z is !type.equals("deleted") - D. X is match
Y is type
Z is !type.equals("deleted") - E. X is matches
Y is arg
Z is type.equals("deleted")
Correct Answer: B 🗳️
Click the Exhibit button.
The application has a single Displayable object.
Which two are true? (Choose two.)
- A. If Go is a Command object, it is possible that another device would map Go to a button on the device (as opposed to a menu list).
- B. The Exit command must have been set with a priority equal to or greater than the priorities of commands Go, Foo, and Bar.
- C. The program code did NOT necessarily specify the location of the Exit button.
- D. In the MIDlet code, a Command object of type Command.MENU must have been created.
- E. If Go, Foo, and Bar are all Command objects, each may have its own separate CommandListener object.
Correct Answer: A,C 🗳️
Given:
1 . import javax.microedition.midlet.*;
2 . public class Foo extends MIDlet {
3 . public void go() {
4 . ThreadGroup x = Thread.currentThread().getThreadGroup();
5 . int numThreads = x.activeCount();
6 . Thread[] threads = null;
7 . x.enumerate(threads);
8 . }
9 . public void destroyApp(boolean b) { }
1 0. public void pauseApp() { }
1 1. public void startApp() { }
1 2. }
What is the result?
- A. Compilation fails because of an error on line 7.
- B. Compilation succeeds and the program runs without errors.
- C. Compilation succeeds, but the program produces a runtime exception or error.
- D. Compilation fails because of an error on line 4.
- E. Compilation fails because of an error on a line other than 4 or 7.
Correct Answer: D 🗳️
What is the result if a call to serviceRepaints() triggers a separate thread to invoke paint()?
- A. The system may deadlock if the caller to serviceRepaints() holds a lock that is also needed by paint().
- B. A deadlock always occurs.
- C. An exception is thrown at runtime.
- D. MIDP is thread-safe. There will never be a deadlock.
Correct Answer: A 🗳️
Given the MIDlet code:
11. try {
1 2. while (true) {
1 3. ServerSocketConnection server = (ServerSocketConnection)
1 4. Connector.open("socket://:444", Connector.READ, true);
1 5. SocketConnection conn= (SocketConnection)
1 6. server.acceptAndOpen();
1 7. InputStream is = conn.openInputStream();
1 8. StringBuffer buffer = new StringBuffer();
1 9. for (int ch = -1; (ch = is.read()) != -1; ){
2 0. buffer.append((char)ch);
2 1. }
2 2. System.out.println(buffer);
2 3. }
2 4. } catch (IOException x) {}
Which two are true? (Choose two.)
- A. The ServerSocketConnection is guaranteed to timeout at line 16 if there is no activity on the connection after a period of time.
- B. The device may run out of connections.
- C. An IOException could occur, causing the while loop to terminate.
- D. The call to server.acceptAndOpen() on line 16 returns immediately if there is no activity on the connection.
Correct Answer: B,C 🗳️
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