Oracle 1Z0-869 Online Practice Questions and Exam Preparation

Oracle 1Z0-869 Online Questions & Answers

• Question 151:

  Given:

  30.

  public boolean X(byte[] Y) throws IllegalArgumentException {

  31.

  ByteArrayInputStream bais = new ByteArrayInputStream(arg);

  32.

  DataInputStream dis = new DataInputStream(bais);

  33.

  String type = null;

  34.

  try {type = dis.readUTF();}

  35.

  catch (Exception e) { }

  36.

  return(Z);

  37.

  }

  Which substitutions for X, Y, and Z in the code create a valid implementation of RecordFilter that matches records whose type is NOT deleted?

  A. X is matches Y is type Z is !type.equals("deleted")
  B. X is matches Y is arg Z is type.equals("deleted")
  C. X is matches Y is arg Z is !type.equals("deleted")
  D. X is match Y is arg Z is type.equals("deleted")
  E. X is match Y is type Z is !type.equals("deleted")
  C. X is matches Y is arg Z is !type.equals("deleted")

• Question 152:

  Assume a device supports datagrams and a MIDlet has permission to use datagram connections. Which two are true? (Choose two.)

  A. Push registration can fail because the device does NOT support the use of datagrams by the PushRegistry.
  B. Push registration can fail if another application has already reserved the connection on the device.
  C. Push registration can fail if the allowed sender filter specified is *, which poses a security risk to the device.
  D. Push registration can fail if there is a push registration conflict, but the user must be prompted as to how to resolve the problem.
  A. Push registration can fail because the device does NOT support the use of datagrams by the PushRegistry.
  B. Push registration can fail if another application has already reserved the connection on the device.

• Question 153:

  A MIDlet needs to receive incoming socket push notifications. It requests only the permissions:

  javax.microedition.io.PushRegistry javax.microedition.io.Connector.socket

  javax.microedition.io.Connector.serversocket

  Which is true?

  A. When an incoming socket connection activates the MIDlet, the MIDlet may be unable to retrieve that connection while starting up.
  B. When an incoming socket connection activates the MIDlet, the MIDlet can always retrieve that connection while starting up.
  C. When an incoming socket connection activates the MIDlet, the MIDlet will always be unable to retrieve that connection while starting up.
  D. The MIDlet CANNOT receive incoming socket push notifications without the permission javax.microedition.io.Connector.socketreceiver.
  A. When an incoming socket connection activates the MIDlet, the MIDlet may be unable to retrieve that connection while starting up.

• Question 154:

  Which three statements are true regarding the handling of wireless connections? (Choose three.)

  A. Performing network operations on the same thread used by the display is likely to block refreshes of the display until the network operations complete.
  B. A network connection could interfere with other services on the device, such as the ability to receive phone calls or SMS on a phone.
  C. Devices can only support one HttpConnection at a time; therefore, network access from multiple threads must be serialized.
  D. The connection could unexpectedly terminate while processing the input or output streams.
  E. Network connections should never be performed on a separate thread, so problems can be handled quickly.
  A. Performing network operations on the same thread used by the display is likely to block refreshes of the display until the network operations complete.
  B. A network connection could interfere with other services on the device, such as the ability to receive phone calls or SMS on a phone.
  D. The connection could unexpectedly terminate while processing the input or output streams.

• Question 155:

  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 suspends the program until more memory becomes available.
  B. The garbage collector CANNOT reclaim the memory allocated to foo because the reference is nulled out.
  C. The garbage collector is triggered and memory is guaranteed to be reclaimed.
  D. The garbage collector is triggered but there are no guarantees that any memory has been reclaimed.
  D. The garbage collector is triggered but there are no guarantees that any memory has been reclaimed.

• Question 156:

  Which four are direct subclasses of Screen? (Choose four.)

  A. Form
  B. List
  C. Canvas
  D. TextField
  E. Alert
  F. Choice
  G. TextBox
  A. Form
  B. List
  E. Alert
  G. TextBox

• Question 157:

  Drag Drop

  Place the classes and methods in the correct positions.

  Select and Place:

  

  

• Question 158:

  Click the Exhibit button.

  The method in the Exhibit must create an HTTP GET connection that works reading both of the following HTTP server response cases:

  HTTP server response headers n.1

  1.

  HTTP/1.1 200 OK

  2.

  Server: MyServer/1.3.0

  3.

  Content-Length: 3245

  4.

  Content-Type: text/html

  HTTP server response headers n.2

  1.

  HTTP/1.1 200 OK

  2.

  Server: MyServer/1.3.0

  3.

  Content-Type: text/html

  Which two can be used in the fragment of code starting at line 12? (Choose two.)

  

  A. 12. if (len > 0) { 13. byte[] data = new byte[len]; 14. int actual = is.read(data); 15. //... 20. } else { 21. int ch; 22. while ((ch = is.read()) != -1) { 23. //... 30. } 31. }
  B. 12. byte[] data = new byte[len]; 13. int actual = is.read(data);
  C. 12. int ch; 13. while ((ch = is.read()) != -1) { 14. //... 20. }
  D. 12. int ch; 13. while ((ch = is.read()) == -1) { 14. //... 20. }
  A. 12. if (len > 0) { 13. byte[] data = new byte[len]; 14. int actual = is.read(data); 15. //... 20. } else { 21. int ch; 22. while ((ch = is.read()) != -1) { 23. //... 30. } 31. }
  C. 12. int ch; 13. while ((ch = is.read()) != -1) { 14. //... 20. }

• Question 159:

  The binding of networking protocols to a MIDlet at runtime can be compared to a type of relationship. Which relationship most closely matches the binding?

  A. caller and callee
  B. mark and sweep
  C. application and device drivers
  D. specification and implementation
  C. application and device drivers

• Question 160:

  A Player plays a sound after start() is called. Which is the most efficient way to pause the playback so that it may be started as soon as possible when required?

  A. call setRate(0) on the player
  B. call stop() on the player
  C. call close() on the player
  D. call System.gc() to collect those resources marked for garbage collection
  B. call stop() on the player