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Oracle 1Z0-869 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: APIs and Specifications | - Wireless Messaging API 1.1 - Networking - Media Using MIDP 2.0 and MMAPI 1.1 - Security (CLDC and MIDP) |
| Topic 2: Java ME Technologies | - CLDC 1.0 and 1.1 - Push Registry - MIDP Game API - MIDP User Interface API - MIDP Persistent Storage |
| Topic 3: 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:
1. Given:
MIDlet-Push-1: datagram://:444, com.fooworks.PushExample, *
MIDlet-Push-2: datagram://:555, com.fooworks.PushExample, *
are statically registered push connections and given:
1 1. protected void startApp() {
1 2. String[] connections = PushRegistry.listConnections(true);
1 3. if(connections.length == 0) {
1 4. connections = PushRegistry.listConnections(false);
1 5. for (int i=0; i < connections.length; i++) {
1 6. new DatagramHandler(connections[i]).start();
1 7. }
1 8. } else {
1 9. for (int i=0; i < connections.length; i++) {
2 0. new DatagramHandler(connections[i]).start();
2 1. }
2 2. }
2 3. }
Which two identify what will go wrong if the code is invoked by the Application Management Software in response to an inbound connection notification? (Choose two.)
A) The first inbound datagram is ignored, all subsequent datagrams are handled by DatagramHandler.
B) Duplicate DatagramHandler objects are created if the MIDlet is paused and then resumed.
C) The first inbound datagram is handled, but all other datagrams are missed.
D) Datagrams for the active connection are handled, but any datagrams sent to the other port are missed.
E) An IOException is thrown if there are no active connections.
2. 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 4.
B) Compilation succeeds and the program runs without errors.
C) Compilation fails because of an error on a line other than 4 or 7.
D) Compilation fails because of an error on line 7.
E) Compilation succeeds, but the program produces a runtime exception or error.
3. Which guarantees the application can be installed without push registration conflicts?
A) The MIDlet tries to register the connection dynamically after installation.
B) The MIDlet specifies multiple push registration strings in the JAD.
C) The MIDlet specifies the push registration in the JAD, but will register dynamically if there is a conflict.
D) It is NOT the responsibility of the MIDlet to resolve these conflicts. The installer does this automatically.
4. Which three are defined as user interaction permission modes? (Choose three.)
A) session
B) blanket
C) oneshot
D) application
E) global
5. Which two are true about the MIDlet suite discovery process? (Choose two.)
A) The discovery of a MIDlet suite is the process by which a JTWI-compliant device installs a MIDlet suite using a search engine.
B) The discovery of a MIDlet suite is the process by which a user locates a MIDlet suite using a JTWI-compliant device.
C) The Application Descriptor is used by the Application Management Software to determine if a MIDlet suite can be successfully installed and executed on the device.
D) The MIDlet suite discovery process always begins with the download of an Application Descriptor file with a .jad extension.
E) The discovery of a MIDlet suite is the process by which a user installs a MIDlet suite on a JTWI-compliant device.
Solutions:
| Question # 1 Answer: B,D | Question # 2 Answer: A | Question # 3 Answer: A | Question # 4 Answer: A,B,C | Question # 5 Answer: B,C |
