Oracle Oracle Certifications 1Z0-869 Questions & Answers

• Question 211:

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

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

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

  E. It provides methods to create Connector objects.

  Correct Answer: BC

• Question 212:

  In the JTWI 1.0 specification, what is the recommended screen size as returned by Canvas.getHeight() and Canvas.getWidth(), when in full screen mode?

  A. 320x240 pixels

  B. 125x125 pixels

  C. 176x208 pixels

  D. 96x54 pixels

  Correct Answer: B

• Question 213:

  Given that rs is an object of type javax.microedition.rms.RecordStore and that record 1 exists in rs, and

  21.

  String one = "short String";

  22.

  String two = "a much longer String";

  23.

  byte [] small = one.getBytes();

  24.

  byte [] big = two.getBytes();

  25.

  rs.setRecord(1, big, 0, big.length);

  26.

  rs.setRecord(1, small, 0, small.length); What is the result?

  A. An exception is thrown at runtime.

  B. Record 1 contains "short String."

  C. Record 1 contains "a much longer String."

  D. Record 1 contains "short Stringr String."

  E. Compilation fails.

  Correct Answer: B

• Question 214:

  Given:

  1.

  import javax.microedition.midlet.*;

  2.

  public class Foo extends MIDlet {

  3.

  public void go() {

  4.

  try {

  5.

  doStuff();

  6.

  } catch(java.lang.NoClassDefFoundError e) { }

  7.

  }

  8.

  void doStuff() { }

  9.

  public void destroyApp(boolean b) { }

  10.

  public void pauseApp() { }

  11.

  public void startApp() {go();}

  12.

  }

  Assuming the application is targeted for CLDC 1.1, what is the result?

  A. Compilation fails because the class does not contain the required method implementations.

  B. Compilation fails because of a problem in line 8.

  C. Compilation fails because of a problem in line 6.

  D. Compilation succeeds.

  Correct Answer: D

• Question 215:

  Given a class named MyCanvas, which three CANNOT be used if MyCanvas is a direct subclass of Canvas? (Choose three.)

  A. public MyCanvas(boolean t) { super(true); }

  B. isDoubleBuffered();

  C. Sprite s = new Sprite(anImage, 20,20);

  D. keyStates = getKeyStates(); if ((keyStates and LEFT_PRESSED) != 0) { }

  E. flushGraphics();

  F. gameAction = getGameAction(keyCode) { }

  Correct Answer: ADE

• Question 216:

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

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

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

  C. inlined in the JAD, using a base64 encoding

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

  Correct Answer: C

• Question 217:

  Given:

  DataInputStream incoming = Connector.openDataInputStream("sms://+3125551234:3434"); Which is true?

  A. The + in the URL is positioned incorrectly.

  B. MessageConnection does NOT support InputStream objects.

  C. Port numbers are NOT allowed in SMS URLs.

  D. The port number indicated is a protected SMS port.

  Correct Answer: B

• Question 218:

  What are two benefits of the PushRegistry? (Choose two.)

  A. It provides a way to restrict HTTP connections to well-known network addresses.

  B. It provides a way for the AMS to automatically invoke a MIDlet at a specified time if it is not already running.

  C. It provides a way for two MIDlet suites running on the same device to discover and communicate with each other in a secure manner.

  D. It provides a way for an incoming connection to invoke a MIDlet that can handle the content sent by the connection.

  Correct Answer: BD

• Question 219:

  Which is true regarding access of the manifest file in a MIDlet suite's JAR file?

  A. The manifest file can be accessed by only one authorized MIDlet in every suite.

  B. The manifest file is hidden from MIDlets and CANNOT be accessed.

  C. The manifest file can be accessed by any class using Class.getResourceAsStream().

  D. The manifest file can be accessed only by using MIDlet.getAppProperty().

  Correct Answer: C

• Question 220:

  Which two are true about record stores? (Choose two.)

  A. For a given enumerator, multiple filters can exist.

  B. For a given record store, multiple comparators can exist.

  C. The RecordStore class provides a method that returns a list of record stores in the MIDlet suite.

  D. A record store's authorization mode can be set only when the record store is created.

  E. The RecordStore class provides a method that returns the ID of the last record modified.

  Correct Answer: BC