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Oracle 1Z0-869 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| JTWI and Wireless Application Overview | - JTWI (JSR 185) and Overview of JTWI-Compliant Wireless Applications |
| Java ME Technologies | - Push Registry - MIDP User Interface API - MIDP Game API - MIDP Persistent Storage - CLDC 1.0 and 1.1 |
| APIs and Specifications | - Wireless Messaging API 1.1 - Media Using MIDP 2.0 and MMAPI 1.1 - Security (CLDC and MIDP) - Networking |
Oracle Java Mobile Edition 1 Mobile Application Developer Certified Professional Sample Questions:
Which two are true about errors and exceptions in a CLDC-compliant virtual machine?
(Choose two.)
- A. Developers do NOT receive asynchronous exceptions from a CLDC-compliant virtual machine.
- B. Developers are NOT allowed to handle errors.
- C. A CLDC-compliant virtual machine must NOT throw a VirtualMachineError.
- D. Developers must throw only checked (non-runtime) exceptions.
- E. Rather than throwing the Error class specified by the Java Language Specification, the CLDC-compliant virtual machine may throw a CLDC-supported superclass.
Click the Exhibit button.
Given the GameCanvas code:
1 0. public void run() {
1 1. try {
1 2. Graphics g = getGraphics();
1 3. Image dog = Image.createImage("/dog.png");
1 4. Sprite s = new Sprite(dog, 98, 88);
1 5. s.setPosition(0,0);
1 6. while (gameActive) {
1 7. s.setFrame(0);
1 8. s.paint(g);
1 9. flushGraphics();
2 0. s.setFrame(1);
2 1. s.paint(g);
2 2. flushGraphics();
2 3. }
2 4. } catch (Exception ex) {
2 5. //...
3 1. }
3 2. }
Assuming that gameActive is true, and that run() is called as a result of a new thread's start() invocation, what is the result?
- A. An animation appears that continuously cycles between the two versions of the dog.
- B. The dog on the left side of the image file appears on the display, but the dog on the right side is never seen.
- C. An exception is thrown at runtime because of an error with the arguments to the Sprite constructor.
- D. Compilation fails because Sprite does NOT have a paint(Graphics g) method.
- E. An IndexOutOfBoundsException occurs due to an error in line 17 or line 20.
Given:
1 0. MessageConnection connection;
1 1.
1 2. public void startApp() {
1 3. //...
1 4. connection
1 5. = (MessageConnection) Connector.open("sms://:6222");
1 6. connection.setMessageListener(this);
1 7. // ...
2 8. }
2 9.
3 0. public void notifyIncomingMessage(MessageConnection conn) {
3 1. //...
4 0. }
4 1.
4 2. public void run() {
4 3. Message msg = conn.receive();
4 4. //...
6 0. }
Which two security permissions must this application request to be able to receive messages? (Choose two.)
- A. javax.wireless.messaging.sms.listener
- B. javax.microedition.io.Connector.sms
- C. javax.wireless.messaging.sms.PushRegistry
- D. javax.microedition.io.PushRegistry
- E. javax.microedition.io.Connector
- F. javax.wireless.messaging.sms.receive
A JTWI device has a working socket implementation. A MIDlet requests permission to use socket connections on this device using the attribute MIDlet-Permissions-Opt, but is denied permission.
Given:
2 0. public void connect() {
2 1. try {
2 2. String addr = "socket://host.com:79";
2 3. SocketConnection sc;
2 4. sc = (SocketConnection) Connector.open(addr);
2 5. sc.setSocketOption(SocketConnection.LINGER, 5);
2 6. InputStream is = sc.openInputStream();
2 7. OutputStream os = sc.openOutputStream();
2 8. os.write("\\r\\n".getBytes());
2 9. int ch = is.read();
3 0. // ...
3 5. } catch (IOException ioe) {
3 6. // ...
4 0. }
4 1. }
Which is true assuming that the argument to Connector.open() points to a valid destination, and the device has resources to create new socket connections?
- A. If connect() executes, a ConnectionNotFoundException is thrown at runtime at line 24.
- B. The device disallows the MIDlet to be installed.
- C. If connect() executes, a SecurityException is thrown at runtime at line 28.
- D. If connect() executes, a SecurityException is thrown at runtime at line 24.
- E. If connect() executes, a SecurityException is thrown at runtime at line 26.
Given: 10. MessageConnection connection;
1 1.
1 2. public void startApp() {
1 3. //...
1 4. connection
1 5. = (MessageConnection) Connector.open("sms://:6222");
1 6. connection.setMessageListener(this);
1 7. // ...
2 8. }
2 9.
3 0. public void notifyIncomingMessage(MessageConnection conn) {
3 1. //...
4 0. }
4 1.
4 2. public void run() {
4 3. Message msg = conn.receive();
4 4. //...
6 0. }
Which two security permissions must this application request to be able to receive messages? (Choose two.)
- A. javax.wireless.messaging.sms.listener
- B. javax.microedition.io.Connector.sms
- C. javax.wireless.messaging.sms.PushRegistry
- D. javax.microedition.io.PushRegistry
- E. javax.microedition.io.Connector
- F. javax.wireless.messaging.sms.receive
