Oracle Oracle Certifications 1Z0-869 Questions & Answers

• Question 281:

  Which three are basic interface types addressed by the Generic Connection Framework? (Choose three.)

  A. telephony-oriented mechanism

  B. circuit-oriented mechanism

  C. location-oriented mechanism

  D. basic serial output connection

  E. basic serial input connection

  Correct Answer: BDE

• Question 282:

  Which two are true for List? (Choose two.)

  A. You can add Command objects to a List without registering a CommandListener.

  B. Images and text in a List CANNOT be changed once the List is created.

  C. Traversing and scrolling in a List causes events that can be programmatically detected.

  D. A CommandListener must be registered for the application to recognize user selections in a List.

  Correct Answer: AD

• Question 283:

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

  A. If two MIDlet suites each have a record store with the same name, then those suites CANNOT share those identically named record stores.

  B. A MIDlet CANNOT access a given record store using multiple simultaneous threads.

  C. Record store names are case sensitive.

  D. The API does NOT provide locking operations for record stores.

  E. MIDlet suites that contain shared record stores are identified by using attributes from that suite's JAR file.

  Correct Answer: CD

• Question 284:

  Given:

  7.

  ServerSocketConnection ssc =

  8.

  SocketConnection sc = (SocketConnection) ssc.acceptAndOpen(); Which entry in the JAD file is used to request multiple permissions?

  (ServerSocketConnection)Connector.open("socket://:5999");

  A. MIDlet-Permission: javax.microedition.io.Connector.socket; javax.microedition.io.Connector.serversocket

  B. MIDlet-Permission: javax.microedition.io.socket MIDlet-Permission: javax.microedition.io.socketserver

  C. MIDlet-Permission: javax.microedition.io.Connector.socket, javax.microedition.io.Connector.serversocket

  D. MIDlet-Permission: javax.microedition.io.Connector.socket MIDlet-Permission: javax.microedition.io.Connector.serversocket

  E. MIDlet-Permission: javax.microedition.io.socket; javax.microedition.serversocket

  Correct Answer: C

• Question 285:

  Which two are true about errors and exceptions in a CLDC-compliant virtual machine? (Choose two.)

  A. A CLDC-compliant virtual machine must NOT throw a VirtualMachineError.

  B. Developers are NOT allowed to handle errors.

  C. Developers do NOT receive asynchronous exceptions from a CLDC-compliant virtual machine.

  D. Developers must throw only checked (non-runtime) exceptions.

  E. Rather than throwing the Error class specified by the Java Language Specification, the CLDC-compliant virtual machine may throw a CLDC-supported superclass.

  Correct Answer: CE

• Question 286:

  Which two are true regarding error handling for classes that exist in both CLDC and J2SE? (Choose two.)

  A. The set of error classes is essentially the same in CLDC and J2SE.

  B. There is no correspondence between the errors defined by CLDC and J2SE because the needs of CLDC and J2SE are so different.

  C. If a class throws an error in CLDC, it should throw the same error as in J2SE or its nearest superclass.

  D. The set of error classes is much reduced in CLDC to help reduce the overhead of the JVM.

  Correct Answer: CD

• Question 287:

  Given:

  DataInputStream incoming =

  Connector.openDataInputStream("sms://+3125551234:3434");

  Which is true?

  A. The + in the URL is positioned incorrectly.

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

  C. Port numbers are NOT allowed in SMS URLs.

  D. MessageConnection does NOT support InputStream objects.

  Correct Answer: D

• Question 288:

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

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

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

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

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

  Correct Answer: C

• Question 289:

  Which two guarantee a wireless message will be removed from the incoming message buffer by the Application Management Software? (Choose two.)

  A. The user denies permission to execute the application.

  B. The incoming message buffer is full.

  C. The message does NOT pass the filter defined in the connection URL.

  D. The application has processed the incoming message.

  Correct Answer: CD

• Question 290:

  Given:

  1.

  import javax.microedition.midlet.*;

  2.

  public class Foo extends MIDlet {

  3.

  public void go() {

  4.

  ThreadGroup x = Thread.currentThread().getThreadGroup();

  5.

  int numThreads = x.activeCount();

  6.

  Thread[] threads = null;

  7.

  x.enumerate(threads);

  8.

  }

  9.

  public void destroyApp(boolean b) { }

  10.

  public void pauseApp() { }

  11.

  public void startApp() { }

  12.

  }

  What is the result?

  A. Compilation fails because of an error on a line other than 4 or 7.

  B. Compilation fails because of an error on line 7.

  C. Compilation succeeds and the program runs without errors.

  D. Compilation fails because of an error on line 4.

  E. Compilation succeeds, but the program produces a runtime exception or error.

  Correct Answer: D