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

1. DRAG DROP
Click the Task button. Place each player state next to its description.

2. Given the MIDlet code:
1 1. public void startApp() {
1 2. Form f = new Form("hello");
1 3. Display.getDisplay(this).setCurrent(f);
1 4. System.gc();
1 5. System.exit(0);
1 6. f.append("foo");
1 7. }
What is the result?

A) The application runs, but line 15 is ignored.
B) Compilation fails.
C) The application runs, but throws an exception at runtime.
D) The application runs, and foo prints to the current display.
E) The application runs without exception, but foo is not printed.

3. DRAG DROP
Click the Task button.
Place the classes and methods in the correct positions.

4. Given:
8 . package javax.microedition.midlet;
9 . import javax.microedition.midlet.*;
1 0. import javax.microedition.io.*;
1 1. import java.io.*;
1 2.
1 3. public class Outlet extends MIDlet {
1 4. public void startApp(){ }
1 5. public void pauseApp(){ }
1 6. public void destroyApp(boolean unconditional){ }
1 7. }
Which is true?

A) The application will NOT compile.
B) The application will compile and will NOT execute.
C) The application will compile and will execute.
D) Compilation fails because of an error in line 8.

5. 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 SecurityException is thrown at runtime at line 24.
B) If connect() executes, a SecurityException is thrown at runtime at line 26.
C) The device disallows the MIDlet to be installed.
D) If connect() executes, a SecurityException is thrown at runtime at line 28.
E) If connect() executes, a ConnectionNotFoundException is thrown at runtime at line 24.

Solutions: