Oracle Oracle Certifications 1Z0-869 Questions & Answers

• Question 301:

  Which two methods are available only within classes of the MIDP high-level UI API? (Choose two.)

  A. getKeyName()

  B. getTitle()

  C. isDoubleBuffered()

  D. notifyStateChanged()

  Correct Answer: BD

• Question 302:

  A MIDP 2.0 compliant device creates an HTTP connection to a server that supports HTTP 1.1. Which is true?

  A. There is no such thing as a 1.1 version of HTTP.

  B. The device definitely does NOT support HTTP 1.1.

  C. The device may or may NOT support HTTP 1.1.

  D. The device definitely supports HTTP 1.1.

  Correct Answer: D

• Question 303:

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

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

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

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

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

  Correct Answer: C

• Question 304:

  Which two are true about errors and exceptions in a CLDC-compliant virtual machine? (Choose two.)

  A. A CLDC-compliant virtual machine must NOT throw a VirtualMachineError.

  B. Developers do NOT receive asynchronous exceptions from a CLDC-compliant virtual machine.

  C. Developers must throw only checked (non-runtime) exceptions.

  D. Rather than throwing the Error class specified by the Java Language Specification, the CLDC-compliant virtual machine may throw a CLDC-supported superclass.

  E. Developers are NOT allowed to handle errors.

  Correct Answer: BD

• Question 305:

  Which two are true about JTWI devices using SMS? (Choose two.)

  A. The payload for an SMS message can use the BinaryMessage interface.

  B. A message which is too big to be sent in a single segment is NOT guaranteed to have its segments arrive at the application in the order in which they were sent.

  C. Multiple messages sent from point A to point B are NOT guaranteed to be delivered in the order in which they were sent.

  D. Java applications are restricted to using port numbers between 2000 and 9207.

  E. The payload for an SMS message segment CANNOT exceed 140 bytes.

  Correct Answer: AC

• Question 306:

  Given:

  a new record store rs, of type javax.microedition.rms.RecordStore containing zero records

  a method called addNewRecord that adds a record to rs

  And:

  21.

  addNewRecord("Amy");

  22.

  addNewRecord("Bill");

  23.

  addNewRecord("Candy");

  24.

  addNewRecord("Doug");

  25.

  rs.deleteRecord(1);

  26.

  rs.deleteRecord(3);

  27.

  addNewRecord("Ethan");

  28.

  addNewRecord("Frank");

  29.

  int nextRecNum = rs.getNextRecordID(); What is the value of nextRecNum?

  A. 7

  B. 5

  C. 4

  D. 6

  Correct Answer: A

• Question 307:

  How would a MIDlet that uses a GameCanvas efficiently update only a small region of the screen, from the data in the off-screen buffer?

  A. call flushGraphics(int, int, int, int) that specifies the region to be flushed

  B. call serviceRepaints() and set a clip region on the Graphics object in paint()

  C. Pixels that are NOT to be flushed should be made transparent.

  D. write extra code to coalesce the flushGraphics() calls over many loops into one call

  Correct Answer: A

• Question 308:

  Given:

  10. //...

  20.

  try {

  21.

  Hashtable table = new Hashtable();

  22.

  for (;;) table.put(new Object(), new Object());

  23.

  } catch (OutOfMemoryException e) {

  24.

  Display.getDisplay().setCurrent(new Alert("Out of Memory!"));

  25.

  }

  26.

  //... Which is true?

  A. An exception is thrown at runtime but there is no guarantee an alert will be shown to the user.

  B. Compilation fails.

  C. The program hangs at line 22.

  D. Out of Memory! is printed to the system console.

  Correct Answer: A

• Question 309:

  Which is true for Item?

  A. The same Command may occur on more than one Item.

  B. The same Item may be appended to more than one Form at the same time.

  C. When adding a Command to an Item, specifying a command type other than Command.ITEM results in a compilation failure.

  D. Minimum and preferred size CANNOT be changed once an Item is created.

  Correct Answer: A

• Question 310:

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

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

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

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

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

  Correct Answer: BCD