Oracle Oracle Certifications 1Z0-869 Questions & Answers

• Question 101:

  A MIDlet makes its only attempt to register a push connection on a JTWI device using:

  PushRegistry.registerConnection(

  "datagram://:79", midlet, "10.0.0.???");

  Which is true?

  A. The call to registerConnection() causes an exception, because the string 10.0.0.??? is an illegal argument.

  B. The MIDlet accepts datagram push connections on port 79 only from IP addresses in the range 10.0.0.0 to 10.0.0.255.

  C. The MIDlet accepts datagram push connections on port 79 only from IP addresses in the range 10.0.0.100 to 10.0.0.255.

  D. The MIDlet accepts datagram push connections on port 79 only from IP addresses in the range 10.0.0.100 to 10.0.0.255 and on any other port from IP addresses other than those in the range 10.0.0.100 to 10.0.0.255.

  Correct Answer: C

• Question 102:

  A MIDlet that is to be installed on a phone has different values for the MIDlet-Name property between the JAD file and the manifest in the JAR file. Which is true?

  A. A dialog is presented to resolve the conflict.

  B. The value in the manifest overrides the value in the JAD file.

  C. The value in the JAD file overrides the value in the manifest.

  D. The MIDlet installation process will be aborted.

  Correct Answer: D

• Question 103:

  Which two are true about the MIDlet suite discovery process? (Choose two.)

  A. The discovery of a MIDlet suite is the process by which a user installs a MIDlet suite on a JTWI-compliant device.

  B. The discovery of a MIDlet suite is the process by which a user locates a MIDlet suite using a JTWI-compliant device.

  C. The discovery of a MIDlet suite is the process by which a JTWI-compliant device installs a MIDlet suite using a search engine.

  D. The MIDlet suite discovery process always begins with the download of an Application Descriptor file with a .jad extension.

  E. The Application Descriptor is used by the Application Management Software to determine if a MIDlet suite can be successfully installed and executed on the device.

  Correct Answer: BE

• Question 104:

  Given:

  10. //...

  20.

  int[] foo = new int[10000];

  21.

  foo = null;

  22.

  System.gc();

  23.

  //...

  Which is true once the program execution reaches line 23?

  A. The garbage collector CANNOT reclaim the memory allocated to foo because the reference is nulled out.

  B. The garbage collector is triggered but there are no guarantees that any memory has been reclaimed.

  C. The garbage collector suspends the program until more memory becomes available.

  D. The garbage collector is triggered and memory is guaranteed to be reclaimed.

  Correct Answer: B

• Question 105:

  What is the minimum volatile memory requirement identified by the CLDC 1.1 specification?

  A. 32 KB

  B. 64 KB

  C. 160 KB

  D. 128 KB

  Correct Answer: A

• Question 106:

  Which two events can result in the removal of a MIDlet's dynamic push connection registration? (Choose two.)

  A. When MIDlet.destroyApp() is called.

  B. Opening the connection using Connector.open().

  C. When the MIDlet is uninstalled.

  D. Using a call to PushRegistry.unregisterConnection().

  E. Using a call to PushRegistry.registerConnection().

  F. Using a call to PushRegistry.removeConnection().

  Correct Answer: CD

• Question 107:

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

  A. All records within a record store have the same length.

  B. MIDlets within the same suite can access the record stores of other MIDlets in the same suite.

  C. Record stores can be locked.

  D. MIDlets within the same suite CANNOT access the record stores of other MIDlets in the same suite.

  E. The first created in a record store has a record ID of 1.

  F. When a MIDlet suite is removed, record store contents remain on the device.

  G. Record store names are case insensitive.

  Correct Answer: BE

• Question 108:

  Assume a particular JTWI phone supports server socket connections. A MIDlet running on the phone attempts to register a connection using:

  PushRegistry.registerConnection(connection, midlet, filter);

  Assume connection, midlet, and filter are NOT null. The statement is executed and throws a ConnectionNotFoundException.

  What causes the exception?

  A. The specified MIDlet does NOT exist.

  B. The syntax of connection is invalid.

  C. The phone does NOT support push connections using server sockets.

  D. The requested connection is already registered.

  Correct Answer: C

• Question 109:

  Click the Exhibit button.

  The red collision rectangle around each Sprite in the image is NOT part of the actual image. The two Sprite objects intersect in the application precisely as shown.

  Which two are true? (Choose two.)

  

  A. The most efficient way to detect collision is to use collision detection based solely on the collision rectangles.

  B. For the two Sprite objects to be considered in collision, collidesWith() must be invoked on both objects.

  C. If Sprite 1 is being tested for collision with Sprite 2 using pixel-level collision detection, the two Sprite objects will NOT be in collision.

  D. For the two Sprite objects to be considered in collision, each Sprite must have no more than one frame.

  Correct Answer: AC

• Question 110:

  Given:

  8.

  package javax.microedition.midlet;

  9.

  import javax.microedition.midlet.*;

  10.

  import javax.microedition.io.*;

  11.

  import java.io.*;

  12.

  13.

  public class Outlet extends MIDlet {

  14.

  public void startApp(){ }

  15.

  public void pauseApp(){ }

  16.

  public void destroyApp(boolean unconditional){ }

  17.

  }

  Which is true?

  A. The application will compile and will execute.

  B. The application will NOT compile.

  C. The application will compile and will NOT execute.

  D. Compilation fails because of an error in line 8.

  Correct Answer: C