Oracle Oracle Certifications 1Z0-869 Questions & Answers

• Question 91:

  What is true when an enumeration applies both a RecordFilter class and RecordComparator class on a record store?

  A. An enumeration CANNOT apply both a RecordFilter and RecordComparator.

  B. The records that match the search criteria in RecordFilter will be returned using the ordering defined by RecordComparator.

  C. All records will always be available as part of the enumeration result set.

  D. The return order of the result set is undefined.

  E. The records that match the search criteria in RecordComparator will be returned using the ordering defined by RecordFilter.

  Correct Answer: B

• Question 92:

  Given the MIDlet code:

  11.

  DatagramConnection dgc =

  (DatagramConnection)Connector.open("datagram://:444");

  12.

  Datagram datagram = dgc.newDatagram(20);

  13.

  dgc.receive(datagram);

  14.

  byte[] data = datagram.getData();

  15.

  String s = new String(data);

  16.

  list.append(s, null);

  17.

  System.out.println("Datagram received: " + s);

  Which two are true regarding the portability of the code between devices? (Choose two.)

  A. Installation will fail on devices that do not support datagrams.

  B. Port 444 may be restricted or ignored by some MIDP implementations.

  C. The code is portable because all the classes and interfaces used are defined in the CLDC.

  D. Datagrams may not be supported on all platforms.

  Correct Answer: BD

• Question 93:

  Given: a JAR containing a MIDlet named TesterMIDlet a JAD with this content: CertificationExam: Sun Certified Mobile Application DeveloperMIDlet-1: TesterMIDlet, , certification.TesterMIDlet MIDlet-Jar-Size: 2038 MIDlet-Jar-URL: Certification.jar

  MIDlet-Name: Certification

  MIDlet-Vendor: A Testing Company MIDlet-Version: 1.0 MicroEdition-Configuration: CLDC-1.0 MicroEdition-Profile: MIDP-2.0 This MIDlet needs to get the property with the key CertificationExam defined in the JAD. This needs to be assigned to a String ExamName from within the MIDlet.startApp() method. What is the correct way to accomplish this?

  A. String ExamName = System.getProperty("CertificationExam");

  B. String ExamName = System.getProperty("MIDlet-CertificationExam");

  C. String ExamName = this.getAppProperty("CertificationExam");

  D. String ExamName = this.getAppProperty("MIDlet-CertificationExam");

  Correct Answer: C

• Question 94:

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

  A. no minimum

  B. 5

  C. 3

  D. 10

  E. 32

  Correct Answer: C

• Question 95:

  Which two are true? (Choose two.)

  A. WMA provides a set of APIs for multimedia content handling.

  B. The J2SE specification extends the MIDP specification.

  C. The goal of the CLDC is to guarantee portability and interoperability between various types of resource-constrained devices.

  D. MIDP 2.0 is a set of APIs that runs on top of the CLDC.

  Correct Answer: CD

• Question 96:

  A MIDlet suite has the application descriptor fragment:

  MIDlet-1: E-mail, email.png, com.example.EmailMIDlet

  The MIDlet suite has the necessary permissions to use the PushRegistry.

  What line does the application descriptor need to register the MIDlet suite for socket push connections on port 79?

  A. MIDlet-Push-1: socket://:79, MIDlet-1, *

  B. MIDlet-Push-1: socket://:79, E-mail, *

  C. MIDlet-Push-1: socket://:79, com.example.EmailMIDlet, *

  D. MIDlet-Push-1: socket://:79, EmailMIDlet, *

  Correct Answer: C

• Question 97:

  Which two are true? (Choose two.)

  A. The goal of the CLDC is to guarantee portability and interoperability between various types of resource-constrained devices.

  B. WMA provides a set of APIs for multimedia content handling.

  C. The J2SE specification extends the MIDP specification.

  D. MIDP 2.0 is a set of APIs that runs on top of the CLDC.

  Correct Answer: AD

• Question 98:

  Given:

  11.

  String base = "44";

  12.

  for(int ccnt=0; ccnt < 5; ccnt++) {

  13.

  try {

  14.

  String temp = base + Integer.toString(ccnt);

  15.

  PushRegistry.registerConnection

  16.

  ("datagram://:" + temp, MIDletName, "*");

  17.

  break;

  18.

  } catch (IOException x) {

  19.

  continue;

  20.

  }

  21.

  }

  Which two are true? (Choose two.)

  A. attempts to reserve a datagram connection for the MIDlet specified by MIDletName, even though the MIDlet may NOT depend on push connections

  B. attempts a number of times to register a datagram connection for use by the MIDlet specified by MIDletName

  C. guarantees that at least 1 datagram connection will be registered for use by the MIDlet specified by MIDletName

  D. registers 5 datagram connections for use by the MIDlet specified in MIDletName

  Correct Answer: AB

• Question 99:

  Which is true about the garbage collector?

  A. It effectively prevents memory leaks.

  B. It needs to be run by the developer.

  C. It manages all memory deallocation.

  D. It always uses the mark and sweep algorithm.

  Correct Answer: C

• Question 100:

  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. BinaryMessage message = new BinaryMessage();

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

  C. Message message = new BinaryMessage();

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

  Correct Answer: D