Oracle Oracle Certifications 1Z0-869 Questions & Answers

• Question 241:

  Which two are true about Gauge? (Choose two.)

  A. The range of values displayed by the implementation always matches the range of values specified by the application.

  B. The current value of a Gauge CANNOT be set programmatically.

  C. You must specify both the initial and maximum values when creating a Gauge.

  D. The visual appearance of a Gauge is determined by the device implementation.

  Correct Answer: CD

• Question 242:

  Click the Exhibit button.

  What is visible on the display when this MIDlet is executed?

  

  examollectionvce.com Leaders in IT Certification 43

  

  A. A white screen is shown momentarily, and then a black screen is shown.

  B. A java.lang.RuntimeException is thrown.

  C. The screen continuously switches back and forth between black and white.

  D. A black screen is shown momentarily, and then a white screen is shown.

  Correct Answer: D

• Question 243:

  Given:

  MIDlet-Push-1: datagram://:444, com.fooworks.PushExample, *

  MIDlet-Push-2: datagram://:555, com.fooworks.PushExample, *

  are statically registered push connections and given:

  11.

  protected void startApp() {

  12.

  String[] connections = PushRegistry.listConnections(true);

  13.

  if(connections.length == 0) {

  14.

  connections = PushRegistry.listConnections(false);

  15.

  for (int i=0; i < connections.length; i++) {

  16.

  new DatagramHandler(connections[i]).start();

  17.

  }

  18.

  } else {

  19.

  for (int i=0; i < connections.length; i++) {

  20.

  new DatagramHandler(connections[i]).start();

  21.

  }

  22.

  }

  23.

  }

  Which two identify what will go wrong if the code is invoked by the Application Management

  Software in response to an inbound connection notification? (Choose two.)

  A. Duplicate DatagramHandler objects are created if the MIDlet is paused and then resumed.

  B. An IOException is thrown if there are no active connections.

  C. The first inbound datagram is handled, but all other datagrams are missed.

  D. Datagrams for the active connection are handled, but any datagrams sent to the other port are missed.

  E. The first inbound datagram is ignored, all subsequent datagrams are handled by DatagramHandler.

  Correct Answer: AD

• Question 244:

  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 setRate(0) on the player

  B. call stop() on the player

  C. call close() on the player

  D. call System.gc() to collect those resources marked for garbage collection

  Correct Answer: B

• Question 245:

  Which four are direct subclasses of Screen? (Choose four.)

  A. Alert

  B. List

  C. TextField

  D. Form

  E. TextBox

  F. Canvas

  G. Choice

  Correct Answer: ABDE

• Question 246:

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

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

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

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

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

  Correct Answer: C

• Question 247:

  Given:

  HttpConnection conn =

  (HttpConnection) Connector.open("http://internalsite:8080/");

  and

  MIDlet-Permission-Opt is set to javax.microedition.io.Connector.http in the JAD file.

  What is the result?

  A. The application will install and execute without explicit user interaction.

  B. The application will install, but the application will not execute.

  C. The application will not install in the untrusted domain.

  D. The application will install and execute with explicit user interaction.

  Correct Answer: D

• Question 248:

  Given:

  21.

  MessageConnection mc;

  22.

  mc = (MessageConnection) Connector.open("sms://:6222");

  23.

  mc.setMessageListener(this);

  24.

  reader = new MsgReader();

  25.

  new Thread(reader).start();

  26.

  //...

  35.

  public void notifyIncomingMessage(MessageConnection mc2) {

  36.

  //...

  40.

  }

  41.

  //...

  50.

  class MsgReader implements Runnable {

  51.

  //...

  55. }

  Which two are true? (Choose two.)

  A. This MIDlet uses asynchronous WMA message handling.

  B. This MIDlet must have a MIDlet-Push- entry in its JAD file.

  C. This MIDlet must contain a call to PushRegister.registerConnection().

  D. This MIDlet uses synchronous WMA message handling.

  E. This MIDlet typically includes a method call such as: mc.receive().

  Correct Answer: AE

• Question 249:

  Which JAD attribute must be present to begin the MIDlet suite authentication process using

  A. 509 PKI?

  B. MIDlet-Permission

  C. MIDlet-Jar-RSA-SHA1

  D. MIDlet-Certificate-n-m

  E. MIDlet-Permission-Opt

  Correct Answer: B

• Question 250:

  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 System.gc() to collect those resources marked for garbage collection

  C. call stop() on the player

  D. call setRate(0) on the player

  Correct Answer: C