Oracle Oracle Certifications 1Z0-869 Questions & Answers

• Question 71:

  Given:

  a record store of type javax.microedition.rms.RecordStore, containing five records whose contents are Alice, Bill, Candice, Dean, and Ethel, respectively

  an enumeration for the record store that specifies a comparator that sorts alphabetically

  The first call to the enumeration is previousRecord().

  Which would be returned by a second call to previousRecord()?

  A. Dean

  B. Ethel

  C. Bill

  D. Alice

  E. Candice

  F. An exception is thrown at runtime.

  Correct Answer: A

• Question 72:

  Which creates a new record store of type javax.microedition.rms.RecordStore that can be shared between MIDlet suites?

  A. openRecordStore("cust", false, AUTHMODE_ANY, false);

  B. openRecordStore("cust", true, AUTHMODE_ANY, false);

  C. openRecordStore("cust", true, AUTHMODE_SHARED, false);

  D. openRecordStore("cust", false, AUTHMODE_SHARED, false);

  Correct Answer: B

• Question 73:

  Which guarantees the application can be installed without push registration conflicts?

  A. It is NOT the responsibility of the MIDlet to resolve these conflicts. The installer does this automatically.

  B. The MIDlet specifies the push registration in the JAD, but will register dynamically if there is a conflict.

  C. The MIDlet tries to register the connection dynamically after installation.

  D. The MIDlet specifies multiple push registration strings in the JAD.

  Correct Answer: C

• Question 74:

  When using X.509 PKI, where must a MIDlet suite's security certificates be placed?

  A. inlined in the JAR manifest, using a base64 encoding

  B. in .cer files in the JAR's META-INF directory

  C. inlined in the JAD, using a base64 encoding

  D. in a user-defined subclass of SecurityInfo in the JAR's META-INF directory

  Correct Answer: C

• Question 75:

  wav is a content type supported on a device that executes:

  10.

  Player p;

  11.

  p = Manager.createPlayer("http://foobar.sun.com/sound.wav");

  12.

  p.prefetch(); Which is true?

  A. An exception is generated at runtime.

  B. No exception is thrown at runtime. No sound is played.

  C. The result is device-dependent.

  D. sound.wav is played on the device.

  Correct Answer: B

• Question 76:

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

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

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

  D. Compilation fails.

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

  Correct Answer: C

• Question 77:

  Given: 10. MessageConnection connection;

  11.

  12.

  public void startApp() {

  13.

  //...

  14.

  connection

  15.

  = (MessageConnection) Connector.open("sms://:6222");

  16.

  connection.setMessageListener(this);

  17.

  // ...

  28.

  }

  29.

  30.

  public void notifyIncomingMessage(MessageConnection conn) {

  31.

  //...

  40.

  }

  41.

  42.

  public void run() {

  43.

  Message msg = conn.receive();

  44.

  //...

  60. }

  Which two security permissions must this application request to be able to receive messages? (Choose two.)

  A. javax.wireless.messaging.sms.PushRegistry

  B. javax.microedition.io.Connector

  C. javax.wireless.messaging.sms.listener

  D. javax.microedition.io.Connector.sms

  E. javax.microedition.io.PushRegistry

  F. javax.wireless.messaging.sms.receive

  Correct Answer: DF

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• Question 78:

  An open record store, rs, contains five records with record IDs 1, 2, 3, 4, and 5.

  1.

  byte[] data = new byte[10];

  2.

  3.

  for (int i = 1; i <= rs.getNumRecords(); i++)

  4.

  {

  5.

  if (rs.getRecordSize(i) > data.length)

  6.

  data = new byte[rs.getRecordSize(i)];

  7.

  rs.getRecord(i, data, 0);

  8.

  System.out.println(new String(data));

  9.

  }

  If record ID 3 is deleted, and the code is run, what is the result?

  A. This code generates a RuntimeException.

  B. This code runs without any errors.

  C. This code generates a NullPointerException.

  D. This code generates an InvalidRecordIDException.

  E. This code generates a RecordIDException.

  Correct Answer: D

• Question 79:

  Which two are true about the javax.wireless.messaging.MessageConnection interface? (Choose two.)

  A. Threads that are waiting to receive messages must be blocking threads.

  B. This interface is intended for all wireless messaging protocols.

  C. When creating a client mode message, a string that identifies an endpoint on the local host should be passed to Connector.open().

  D. It provides methods to create Connector objects.

  E. An application can have both client and server mode MessageConnection instances open simultaneously.

  Correct Answer: BE

• Question 80:

  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, E-mail, *

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

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

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

  Correct Answer: D