Oracle Oracle Certifications 1Z0-869 Questions & Answers

• Question 271:

  Which two are true about sockets and datagrams? (Choose two.)

  A. Closing a SocketConnection automatically closes any associated input or output streams.

  B. Datagrams are used to send packets of data over a SocketConnection.

  C. A datagram is an independent, self-contained message sent over the network.

  D. Both datagrams and sockets use streams as the basis for their communication.

  E. Datagrams are guaranteed to reach their intended destination.

  F. Data sent over a TCP/IP socket is received in the same order that it was sent.

  Correct Answer: CF

• Question 272:

  Given the MIDlet code:

  11.

  try {

  12.

  while (true) {

  13.

  ServerSocketConnection server = (ServerSocketConnection)

  14.

  Connector.open("socket://:444", Connector.READ, true);

  15.

  SocketConnection conn= (SocketConnection)

  16.

  server.acceptAndOpen();

  17.

  InputStream is = conn.openInputStream();

  18.

  StringBuffer buffer = new StringBuffer();

  19.

  for (int ch = -1; (ch = is.read()) != -1; ){

  20.

  buffer.append((char)ch);

  21.

  }

  22.

  System.out.println(buffer);

  23.

  }

  24.

  } catch (IOException x) {} Which two are true? (Choose two.)

  A. The device may run out of connections.

  B. The call to server.acceptAndOpen() on line 16 returns immediately if there is no activity on the connection.

  C. An IOException could occur, causing the while loop to terminate.

  D. The ServerSocketConnection is guaranteed to timeout at line 16 if there is no activity on the connection after a period of time.

  Correct Answer: AC

• Question 273:

  Which three are true? (Choose three.)

  A. A MIDlet suite consists of only one JAR file.

  B. Different MIDlet suites can share data with each other.

  C. A MIDlet suite can have more than one class that extends the MIDlet class.

  D. A MIDlet suite is an array of MIDlet objects.

  E. The names of MIDlet classes that belong to different MIDlet suites must be different.

  Correct Answer: ABC

• Question 274:

  Given:

  15.

  String addr = "sms://+14155557296";

  16.

  MessageConnection conn

  17.

  = (MessageConnection) Connector.open(addr);

  18.

  // insert code here

  19.

  message.setPayloadData(imageBytes);

  Assume imageBytes is a valid byte array.

  Which statement, inserted at line 18, causes the rest of the code fragment to compile correctly?

  A. Message message = new BinaryMessage();

  B. BinaryMessage message = (BinaryMessage) conn.newMessage(MessageConnection.BINARY_MESSAGE);

  C. Message message = conn.newMessage(MessageConnection.BINARY_MESSAGE);

  D. BinaryMessage message = new BinaryMessage();

  Correct Answer: B

• Question 275:

  What is the minimum number of received SMS messages that a JTWI device must be able to concatenate?

  A. 5

  B. 32

  C. 10

  D. 3

  E. no minimum

  Correct Answer: D

• Question 276:

  Click the Exhibit button.

  Given:

  String cert = getAppProperty("MIDlet-Certificate-1-1");

  What value is assigned to the cert variable when run on a MIDP 2.0 implementation?

  A. The requested property value from the JAD file is assigned to cert.

  B. A runtime exception will occur.

  C. The requested property value from the MANIFEST.MF file is assigned to cert.

  D. The application will NOT install.

  Correct Answer: A

• Question 277:

  Click the Exhibit button.

  NewsMIDlet and CalendarMIDlet are in different MIDlet suites. Neither has any static push registrations.

  Suppose NewsMIDlet registers dynamically for datagram push notifications on port 79.

  What happens if a method CalendarMIDlet.init() attempts to open a UDPDatagramConnection on port 79?

  

  A. init() succeeds without user confirmation, and removes NewsMIDlet's registration for datagram push connections.

  B. init() fails to open the connection.

  C. init() succeeds only with user confirmation.

  D. init() succeeds without user confirmation, and leaves untouched NewsMIDlet's registration for datagram push connections.

  Correct Answer: B

• Question 278:

  A MIDlet suite is signed using X.509 PKI. Which encoding format must be used for the certificate entries in the JAD file?

  A. yEnc

  B. binary

  C. none

  D. base64

  Correct Answer: D

• Question 279:

  obscure is a content type unsupported on a device that executes: 10. String locator = "http://foobar.sun.com/content.obscure"; 11. Player player = Manager.createPlayer(locator); Which is true?

  A. An exception is thrown at runtime.

  B. The file is interpreted as an ASCII file.

  C. player is set to null.

  D. The file is interpreted as an HTML file.

  Correct Answer: A

• Question 280:

  Which two are true? (Choose two.)

  A. GameCanvas provides an off-screen buffer.

  B. GameCanvas extends Canvas and is NOT abstract.

  C. GameCanvas provides the ability to get the states of the physical keys of the device.

  D. GameCanvas can render only Sprite and Layer objects.

  Correct Answer: AC