Oracle Oracle Certifications 1Z0-869 Questions & Answers

• Question 111:

  Given:

  50.

  class MyGameCanvas extends Canvas {

  51.

  //...

  60.

  public MyGameCanvas() {

  61.

  int width1 = getWidth();

  62.

  int height1 = getHeight();

  63.

  //...

  70.

  setFullScreenMode(true);

  71.

  //...

  80.

  int width2 = getWidth();

  81.

  int height2 = getHeight();

  82.

  //...

  90. }

  What is true about width1, height1 and width2, height2?

  A. width1 is always equal to width2.

  B. The system tries to provide maximum visible area to the MIDlet and these dimensions are width2, height2.

  C. The call to setFullScreenMode() is ignored because the dimensions have already been set.

  D. height1 is always equal to height2.

  Correct Answer: B

• Question 112:

  Which declaration is illegal?

  A. openRecordStore("Customer_Name_and_Address", true);

  B. openRecordStore("Salesperson_Projections_by_Month", "acme", "sales");

  C. openRecordStore("High_Scores_Stored_by_City_and_Name", false);

  D. openRecordStore("Customer_Projections", true, RecordStore.AUTHMODE_ANY, true);

  Correct Answer: C

• Question 113:

  A mobile application developer is trying to reduce the memory footprint of a game using the MIDP Game API? Which is a valid approach?

  A. restrict the number of frames per Sprite to one

  B. implement keyPressed() and keyReleased()

  C. reuse a single GameCanvas throughout the application

  D. use a single bitmap background rather than multiple tiles

  Correct Answer: C

• Question 114:

  What is the minimum number of simultaneously running threads that a JTWI 1.0 device must support for each MIDlet suite?

  A. 3

  B. 1

  C. two running threads for each class of the MIDlet suite

  D. 10

  Correct Answer: D

• Question 115:

  What is the minimum number of simultaneously running threads that a JTWI 1.0 device must support for each MIDlet suite?

  A. 3

  B. two running threads for each class of the MIDlet suite

  C. 1

  D. 10

  Correct Answer: D

• Question 116:

  GSM defines two mechanisms for SMS message concatenation. Which is true?

  A. JTWI devices may implement either mechanism for sent messages, and must implement both mechanisms for received messages.

  B. JTWI devices must implement both mechanisms for sent messages, and may implement either mechanism for received messages.

  C. JTWI devices must implement both mechanisms for sent and received messages.

  D. JTWI devices may implement either mechanism for sent and received messages.

  Correct Answer: A

• Question 117:

  Assuming an application descriptor contains: MIDlet-Data-Size: 4096 Which is true?

  A. The device will use 4096 bytes to buffer data the application receives over the network.

  B. The device will permanently reserve 4096 bytes of heap space for the application.

  C. The device will permanently reserve 4096 bytes of RMS space for the application.

  D. The device will use 4096 bytes to buffer data the application sends over the network.

  Correct Answer: C

• Question 118:

  A mobile application developer wants to reduce memory use and improve the speed of a game using the MIDP 2.0 Game API. Which three are valid, legal ways to help fulfill the developer's goal? (Choose three.)

  A. while(gameActive) { int keyStates = getKeyStates(); if ((keyStates and LEFT_PRESSED) != 0) { // code to move a Sprite }

  B. GameCanvas game = new GameCanvas(true); //suppress key events

  C. layerManager.setViewWindow(0,0, getWidth() + 50, getHeight() + 50);

  D. mySprite.collidesWith(otherSprite, false); //pixel level false

  E. keyPressed(int keyCode) { // code to process the key press event }

  Correct Answer: ABD

• Question 119:

  Which is true regarding CLDC?

  A. A CLDC implementation can provide features that are optional.

  B. A CLDC implementation CANNOT provide features that are optional.

  C. A CLDC implementation must provide at least one optional feature.

  D. A CLDC implementation generally defines a superset of J2SE technology.

  Correct Answer: B

• Question 120:

  Given the MIDlet code:

  7.

  String s = System.getProperty("microedition.configuration");

  8.

  if (!s.equals("CLDC-1.1")) {

  9.

  s = "CLDC-1.1";

  10.

  }

  11.

  System.setProperty(s);

  Which statement is true?

  A. Compilation fails because of an error in line 7.

  B. Property is set to "CLDC-1.1."

  C. SecurityException is thrown at runtime.

  D. Compilation fails because of an error in line 11.

  Correct Answer: D