Oracle Oracle Certifications 1Z0-869 Questions & Answers

• Question 251:

  Given:

  rs is an object of type javax.microedition.rms.RecordStore.

  baos is an object of type java.io.DataOutputStream.

  recId is an int.

  Which adds a record to rs?

  A. byte [] b = baos.toByteArray(); try { recId = rs.addRecord(b, 0, b.length); } catch (Exception e) { }

  B. byte [] b = baos.toByteArray(); try { recId = rs.add(b, 0, b.length); } catch (Exception e) { }

  C. byte [] b = baos.write(); try { recId = rs.addRecord(b, 0, b.length); } catch (Exception e) { }

  D. byte [] b = baos.writeByteArray(); try { recId = rs.addRecord(b, 0, b.length); } catch (Exception e) { }

  E. byte [] b = baos.writeByteArray(); try { recId = rs.add(b, 0, b.length); } catch (Exception e) { }

  F. byte [] b = baos.write(); try { recId = rs.add(b, 0, b.length); } catch (Exception e) { }

  Correct Answer: A

• Question 252:

  Which two are true about class file verification as defined by the CLDC specification? (Choose two.)

  A. Verification is NOT required.

  B. Verification can use a custom implementation.

  C. Verification is completed at compile time and no further verification is necessary.

  D. Verification can use the same implementation as defined in the JVM specification.

  Correct Answer: BD

• Question 253:

  Given:

  Layer heroShip = aLayerManager.getLayerAt(0);

  Which is true?

  A. An ArrayIndexOutOfBoundsException is thrown.

  B. The getLayerAt() is not a valid method of the LayerManager class.

  C. An IllegalArgumentException is thrown.

  D. The heroShip is assigned to the Layer object located at index 0.

  Correct Answer: D

• Question 254:

  Which is true when using multiple threads to access a record store?

  A. You must coordinate access to a record store to prevent data corruption.

  B. The implementation coordinates access, ensuring that record stores will NOT be corrupted.

  C. You CANNOT access a record store with multiple threads.

  D. You must lock a record store prior to access.

  Correct Answer: A

• Question 255:

  obscure is a content type unsupported on a device that executes:

  10.

  String locator = "http://foobar.sun.com/content.obscure";

  11.

  Player player = Manager.createPlayer(locator); Which is true?

  A. The file is interpreted as an HTML file.

  B. An exception is thrown at runtime.

  C. The file is interpreted as an ASCII file.

  D. player is set to null.

  Correct Answer: B

• Question 256:

  Given:

  12.

  canvas.repaint(x1,y1,wd,ht);

  13.

  canvas.repaint(x2,y2,wd,ht);

  14.

  canvas.serviceRepaints(); Which two are true? (Choose two.)

  A. serviceRepaints() blocks waiting for paint() to return.

  B. paint() is called three times, once for each repaint() and once for serviceRepaints().

  C. paint() is always called twice, once for each repaint() request.

  D. If the two regions specified in repaint() overlap, repaint() may attempt to paint the union of the two areas.

  Correct Answer: AD

• Question 257:

  Which is true about PushRegistry.registerAlarm()?

  A. PushRegistry.registerAlarm() works independently of the network protocols available for push connections.

  B. JTWI devices may choose NOT to implement PushRegistry.registerAlarm().

  C. PushRegistry.registerAlarm() is overloaded to play audio file arguments.

  D. PushRegistry.registerAlarm() supports several outstanding activation times per MIDlet.

  Correct Answer: A

• Question 258:

  Which arguments should be passed to Connector.open() and TextMessage.setAddress(), respectively, to initiate an SMS text message using a server connection?

  A. sms://+18005551234, with no need to call setAddress()

  B. sms://:1234 and sms://+18005551234

  C. sms://:1234, with no need to call setAddress()

  D. sms://+18005551234 and sms://:1234

  Correct Answer: B

• Question 259:

  Given

  10. // ...

  20.

  VolumeControl vc;

  21.

  vc = (VolumeControl) player.getControl("VolumeControl");

  22.

  vc.setLevel(4);

  23.

  // ...

  Which is true about the volume of audio playback from player when the code is executed?

  A. The volume of the audio is exactly 40 dB.

  B. The volume of the audio must be the same on all MIDP devices.

  C. The volume of the audio is up to the MIDP device.

  D. The volume of the audio is approximately 0.4 dB.

  Correct Answer: C

• Question 260:

  What is the result if a call to serviceRepaints() triggers a separate thread to invoke paint()?

  A. An exception is thrown at runtime.

  B. The system may deadlock if the caller to serviceRepaints() holds a lock that is also needed by paint().

  C. A deadlock always occurs.

  D. MIDP is thread-safe. There will never be a deadlock.

  Correct Answer: B