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

1. Which two can the developer define for a TextField? (Choose two.)

A) maximum number of characters
B) shape
C) font
D) input constraints
E) color

2. When can a MIDlet suite be installed in the untrusted domain?

A) when suite is NOT signed with an X.509 PKI certificate
B) when suite is authenticated using an X.509 PKI certificate and the certificate fails signature verification
C) when suite is authenticated using an X.509 PKI certificate and the certificate is invalid
D) when suite is authenticated using an X.509 PKI certificate and the certificate is expired

3. Which two are true about the MIDP user interface API? (Choose two.)

A) Canvas is a subclass of Screen.
B) Form is a multicast event source for CommandListener objects.
C) A single Command can have both a long and a short label.
D) There can be multiple Displayable objects shown on the display at the same time.
E) All UI events are sent to the application asynchronously.
F) There can be only one Display object per MIDlet.

4. Given the MIDlet code:
1 2. File f = new File("myFile.txt");
1 3. FileOutputStream ds = new FileOutputStream(f);
1 4. OutputStreamWriter os = new OutputStreamWriter(ds);
1 5. BufferedWriter buf = new BufferedWriter(os);
1 6. buf.write('c');
What is the result?

A) The code compiles and runs, and then writes the character c to the file myFile.txt.
B) Compilation succeeds, but an exception is thrown at runtime.
C) Compilation fails because the code uses one or more classes, which are not supported in CLDC 1.1.
D) The code compiles and runs, but line 16 is ignored.

5. Which is true about the process of updating a MIDlet suite in a JTWI-compliant device?

A) A MIDlet suite CANNOT be updated with the same MIDlet suite from a different URL.
B) The RMS record stores of the updated MIDlet suite are always lost.
C) A MIDlet suite CANNOT be updated with another MIDlet suite that has a lower value for the MIDlet-Version attribute.
D) An unsigned MIDlet suite must NOT be allowed to update a signed MIDlet suite.

Solutions: