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Oracle 1Z0-869 Exam Syllabus Topics:

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

1. A Player plays a sound after start() is called. Which is the most efficient way to pause the playback so that it may be started as soon as possible when required?

A) call close() on the player
B) call setRate(0) on the player
C) call stop() on the player
D) call System.gc() to collect those resources marked for garbage collection

2. Click the Exhibit button.
The application has a single Displayable object.
Which two are true? (Choose two.)

A) The Exit command must have been set with a priority equal to or greater than the priorities of commands Go, Foo, and Bar.
B) The program code did NOT necessarily specify the location of the Exit button.
C) If Go, Foo, and Bar are all Command objects, each may have its own separate CommandListener object.
D) In the MIDlet code, a Command object of type Command.MENU must have been created.
E) If Go is a Command object, it is possible that another device would map Go to a button on the device (as opposed to a menu list).

3. Which three are true? (Choose three.)

A) The names of MIDlet classes that belong to different MIDlet suites must be different.
B) A MIDlet suite is an array of MIDlet objects.
C) A MIDlet suite can have more than one class that extends the MIDlet class.
D) Different MIDlet suites can share data with each other.
E) A MIDlet suite consists of only one JAR file.

4. An open record store, rs, contains five records with record IDs 1, 2, 3, 4, and 5.
1 . byte[] data = new byte[10];
2 .
3 . for (int i = 1; i <= rs.getNumRecords(); i++)
4 . {
5 . if (rs.getRecordSize(i) > data.length)
6 . data = new byte[rs.getRecordSize(i)];
7 . rs.getRecord(i, data, 0);
8 . System.out.println(new String(data));
9 . }
If record ID 3 is deleted, and the code is run, what is the result?

A) This code generates a RuntimeException.
B) This code generates a NullPointerException.
C) This code runs without any errors.
D) This code generates an InvalidRecordIDException.
E) This code generates a RecordIDException.

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

Solutions: