Oracle Oracle Certifications 1Z0-869 Questions & Answers

• Question 21:

  Click the Exhibit button.

  Given:

  The MIDlet is executed.

  The MIDlet is paused and resumed two times.

  What is the result?

  

  A. c: 1

  B. An exception is thrown at runtime.

  C. c: 2

  D. c: 3

  E. c: 0

  Correct Answer: D

• Question 22:

  Which is true regarding the javax.wireless.messaging package?

  A. Message objects are assumed always to be blocks of binary data.

  B. The messaging protocols that use this API are typically store-and-forward.

  C. This API is designed to run exclusively on the GSM SMS protocol.

  D. Messages are usually lost if the recipient is not connected at the time of sending.

  Correct Answer: B

• Question 23:

  A JTWI application sends a text message using the code:

  message.setPayloadText("hello world!");

  conn.send(message);

  What exception will this code throw if a timeout occurs while trying to send the message?

  A. java.lang.NullPointerException

  B. java.io.EOFException

  C. java.io.InterruptedIOException

  D. java.lang.SecurityException

  Correct Answer: C

• Question 24:

  Which object or objects must be created to generate a simple tone?

  A. A Player and ToneControl must be created.

  B. A Player must be created.

  C. None. Manager can be used to generate a simple tone.

  D. A Player and a PlayerListener must be created.

  Correct Answer: C

• Question 25:

  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 is expired

  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 fails signature verification

  Correct Answer: A

• Question 26:

  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 27:

  Given:

  10. //...

  20.

  int note = ToneControl.C4;

  21.

  for (int i=0; i<200; i++) {

  22.

  Manager.playTone(note += 2, 100, 10);

  23.

  }

  24.

  System.out.println("done");

  25.

  //... Which is true?

  A. An IllegalArgumentException is thrown at runtime.

  B. The program hangs in the for loop.

  C. A tone sequence of rising pitch plays and done is printed.

  D. Compilation fails.

  Correct Answer: A

• Question 28:

  Which three statements are true regarding the handling of wireless connections? (Choose three.)

  A. Network connections should never be performed on a separate thread, so problems can be handled quickly.

  B. Performing network operations on the same thread used by the display is likely to block refreshes of the display until the network operations complete.

  C. The connection could unexpectedly terminate while processing the input or output streams.

  D. Devices can only support one HttpConnection at a time; therefore, network access from multiple threads must be serialized.

  E. A network connection could interfere with other services on the device, such as the ability to receive phone calls or SMS on a phone.

  Correct Answer: BCE

• Question 29:

  Which two are true about developing a MIDP 2.0-compliant user interface? (Choose two.)

  A. TextBox is not a portable UI Displayable.

  B. Canvas is considered part of the low-level user interface API.

  C. Support for starting threads in an event handler is not guaranteed across all devices.

  D. The only way to guarantee that text displays properly on the screen is to use the low- level API and draw the string directly in the paint() method.

  E. Double-buffering is not guaranteed when using Canvas.

  F. Command instances are always mapped to soft buttons on the device.

  Correct Answer: BE

• Question 30:

  Which two are true when deleting a record store? (Choose two.)

  A. If the record store is open, an exception will be thrown.

  B. For any registered listener of the record store, recordDeleted() will be called.

  C. The record store must be open prior to calling deleteRecordStore().

  D. The record store must be closed prior to calling deleteRecordStore().

  Correct Answer: AD