Oracle Oracle Certifications 1Z0-869 Questions & Answers

• Question 131:

  Given:

  30.

  public boolean X(byte[] Y) throws IllegalArgumentException {

  31.

  ByteArrayInputStream bais = new ByteArrayInputStream(arg);

  32.

  DataInputStream dis = new DataInputStream(bais);

  33.

  String type = null;

  34.

  try {type = dis.readUTF();}

  35.

  catch (Exception e) { }

  36.

  return(Z);

  37.

  }

  Which substitutions for X, Y, and Z in the code create a valid implementation of RecordFilter that matches records whose type is NOT deleted?

  A. X is matches Y is type Z is !type.equals("deleted")

  B. X is matches Y is arg Z is type.equals("deleted")

  C. X is matches Y is arg Z is !type.equals("deleted")

  D. X is match Y is arg Z is type.equals("deleted")

  E. X is match Y is type Z is !type.equals("deleted")

  Correct Answer: C

• Question 132:

  Given a MIDP 2.0 device supports alpha blending, a MIDlet needs to render semi- transparent images of size 10x10 pixels. However, these images need to be generated at runtime. That is, they CANNOT be loaded as PNGs. What is the correct way to create a 10x10, red, semi-transparent image, using only the MIDP 2.0 API?

  A. use createImage() to create a mutable Image; first fill it with white pixels, then fill it with red pixels

  B. This is not possible. An Image with semi-transparency CANNOT be created at runtime.

  C. use createImage() to create a mutable Image, then fill it with red pixels

  D. use createRGBImage() to create an immutable Image from ARGB data with the desired values

  Correct Answer: D

• Question 133:

  Given:

  DateField df = new DateField("Date", DateField.DATE_TIME);

  Which requests the width of df to fill available screen space?

  A. df.setLayout(Item.LAYOUT_MAXIMUM);

  B. df.setLayout(Item.LAYOUT_RIGHT);

  C. df.setLayout(Item.LAYOUT_EXPAND);

  D. df.setLayout(Item.LAYOUT_FULL);

  Correct Answer: C

• Question 134:

  What is the area that the developer must paint when using CustomItem?

  A. CustomItem must paint the content area, its labels, and its border.

  B. CustomItem is limited to painting in the content area.

  C. The areas are unlimited. CustomItem may paint inside any area on the screen.

  D. CustomItem size is always honored by the system. Once created, the CustomItem always has this area to paint in.

  Correct Answer: B

• Question 135:

  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 use 4096 bytes to buffer data the application sends over the network.

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

  Correct Answer: D

• Question 136:

  Given:

  10.

  public class ExampleMIDlet extends MIDlet {

  11.

  //...

  20.

  public ExampleMIDlet() {

  21.

  Hashtable cache = new Hashtable();

  22.

  synchronized (cache) {

  23.

  while (cache.isEmpty()) {

  24.

  try {cache.wait();}

  25.

  catch (InterruptedException e) {/* handle me */}

  26.

  }

  27.

  }

  28.

  }

  29.

  //...

  40. }

  Which two are true? (Choose two.)

  A. The program hangs.

  B. An unchecked exception is thrown at runtime.

  C. The program is in conflict with recommendations of the MIDP specification.

  D. An IllegalMonitorStateException is thrown at runtime.

  Correct Answer: AC

• Question 137:

  Which is true about CLDC support for accessing system property information?

  A. Full support for java.util.Properties is available within CLDC.

  B. CLDC supports a subset of java.util.Properties and also provides additional property information using System.getProperty().

  C. CLDC supports a subset of java.util.Properties.

  D. Property information is available in CLDC using System.getProperty().

  Correct Answer: D

• Question 138:

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

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

  Correct Answer: BCD

• Question 139:

  Given the MIDlet code:

  11.

  public void startApp() {

  12.

  Form f = new Form("hello");

  13.

  Display.getDisplay(this).setCurrent(f);

  14.

  System.gc();

  15.

  System.exit(0);

  16.

  f.append("foo");

  17.

  }

  What is the result?

  A. Compilation fails.

  B. The application runs without exception, but foo is not printed.

  C. The application runs, but throws an exception at runtime.

  D. The application runs, and foo prints to the current display.

  E. The application runs, but line 15 is ignored.

  Correct Answer: C

• Question 140:

  How are labels for Command objects displayed to the user?

  A. The device shows either the short or the long label.

  B. Both short and long labels are always available for the user to view.

  C. The short label is always available to view, while the long label may be displayed occasionally.

  D. The long label is only for description and is never displayed.

  Correct Answer: A