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

1. Which is used to retrieve the version of MIDP a device has implemented?

A) System.getProperty("microedition.configuration")
B) System.getAppProperty("microedition.profiles")
C) System.getAppProperty("microedition.platform")
D) System.getProperty("microedition.platform")
E) System.getProperty("microedition.profiles")

2. Given:
7. ServerSocketConnection ssc
(ServerSocketConnection)Connector.open("socket://:5999");
8. SocketConnection sc = (SocketConnection) ssc.acceptAndOpen();
Which entry in the JAD file is used to request multiple permissions?

A) MIDlet-Permission: javax.microedition.io.Connector.socket,
javax.microedition.io.Connector.serversocket
B) MIDlet-Permission: javax.microedition.io.Connector.socket;
javax.microedition.io.Connector.serversocket
C) MIDlet-Permission: javax.microedition.io.socket; javax.microedition.serversocket
D) MIDlet-Permission: javax.microedition.io.socket
MIDlet-Permission: javax.microedition.io.socketserver
E) MIDlet-Permission: javax.microedition.io.Connector.socket
MIDlet-Permission: javax.microedition.io.Connector.serversocket

3. obscure is a content type unsupported on a device that executes:
1 0. String locator = "http://foobar.sun.com/content.obscure";
1 1. Player player = Manager.createPlayer(locator);
Which is true?

A) player is set to null.
B) The file is interpreted as an ASCII file.
C) The file is interpreted as an HTML file.
D) An exception is thrown at runtime.

4. Click the Exhibit button.
The method in the Exhibit must create an HTTP GET connection that works reading both of the following HTTP server response cases:
HTTP server response headers n.1
1 . HTTP/1.1 200 OK
2 . Server: MyServer/1.3.0
3 . Content-Length: 3245
4 . Content-Type: text/html
HTTP server response headers n.2
1 . HTTP/1.1 200 OK
2 . Server: MyServer/1.3.0
3 . Content-Type: text/html
Which two can be used in the fragment of code starting at line 12? (Choose two.)

A) 12. int ch;
1 3. while ((ch = is.read()) == -1) {
1 4. //...
2 0. }
B) 12. if (len > 0) {
1 3. byte[] data = new byte[len];
1 4. int actual = is.read(data);
1 5. //...
2 0. } else {
2 1. int ch;
2 2. while ((ch = is.read()) != -1) {
2 3. //...
3 0. }
3 1. }
C) 12. int ch;
1 3. while ((ch = is.read()) != -1) {
1 4. //...
2 0. }
D) 12. byte[] data = new byte[len];
1 3. int actual = is.read(data);

5. Given a MIDP 2.0 device supports alpha blending, a MIDlet needs to render semi- transparent images of size 10x10 pixels. However, these images need to be generated at runtime. That is, they CANNOT be loaded as PNGs. What is the correct way to create a
10x10, red, semi-transparent image, using only the MIDP 2.0 API?

A) use createRGBImage() to create an immutable Image from ARGB data with the desired values
B) This is not possible. An Image with semi-transparency CANNOT be created at runtime.
C) use createImage() to create a mutable Image, then fill it with red pixels
D) use createImage() to create a mutable Image; first fill it with white pixels, then fill it with red pixels

Solutions: