Oracle Oracle Certifications 1Z0-869 Questions & Answers

• Question 31:

  A MIDlet is written to use the media features available in MIDP 2.0. What change is required to use the MIDlet on a device that supports the full MMAPI?

  A. The creation of Player objects must be modified.

  B. No change is necessary. The MIDP's media API is a proper subset of MMAPI.

  C. The MIDlet CANNOT be used under MMAPI.

  D. Any tone generation code should be removed.

  Correct Answer: B

• Question 32:

  Which is true regarding the use of Thread objects in a CLDC 1.1 compliant virtual machine?

  A. A Thread lives until it exits from the run() method it invoked at startup.

  B. There is no way for one Thread to force another Thread to stop.

  C. A Thread can be stopped only from the inside of a MIDlet class.

  D. To stop a Thread, a developer can use the stop() method.

  Correct Answer: A

• Question 33:

  Which two features were introduced in CLDC 1.1? (Choose two.)

  A. random number generation

  B. weak reference support

  C. floating number support

  D. native interface support

  Correct Answer: BC

• Question 34:

  Given: 10. MessageConnection conn;

  11.

  12.

  public void startApp() {

  13.

  try {

  14.

  conn = (MessageConnection) Connector.open("cbs://:3382");

  15.

  //...

  17.

  } catch (Exception e) {

  18.

  //...

  20.

  }

  21.

  }

  22.

  30.

  public void run() {

  31.

  Message msg = conn.receive();

  32.

  //...

  40.

  conn.send(msg);

  41.

  }

  What is the result?

  A. An error at line 40 causes an exception at runtime.

  B. An error at line 14 causes an exception at runtime.

  C. An error at line 14 causes compile to fail.

  D. The code successfully sends a message.

  E. An error at line 31 causes an exception at runtime.

  Correct Answer: A

• Question 35:

  Which two are true about MIDlet suite provisioning? (Choose two.)

  A. A JTWI-compliant device must support HTTP 1.1 and cookies.

  B. A JTWI-compliant device must support HTTP authentication.

  C. A JTWI-compliant device must support HTTP 1.0.

  D. A JTWI-compliant device must support HTTP 1.1.

  Correct Answer: BD

• Question 36:

  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 if the allowed sender filter specified is *, which poses a security risk to the device.

  B. Push registration can fail if another application has already reserved the connection on the device.

  C. Push registration can fail because the device does NOT support the use of datagrams by the PushRegistry.

  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.

  Correct Answer: BC

• Question 37:

  Click the Exhibit button.

  Given a MIDlet suite with the JAD and the manifest files, what is the behavior of a JTWI- compliant device that tries to download the MIDlet suite?

  

  A. The device does NOT install the MIDlet suite because of an attribute mismatch.

  B. The device installs the JAD file, but does NOT install the JAR file.

  C. The device does NOT install the JAD file.

  D. The device installs the MIDlet suite.

  Correct Answer: D

• Question 38:

  What is the result when a user tries to update a signed, installed MIDlet suite with an unsigned MIDlet suite with the same MIDlet-Name?

  A. The unsigned MIDlet suite is installed if it has a newer MIDlet-Version.

  B. The device blocks all access to any MIDlets.

  C. The signed MIDlet suite is left installed, even if the unsigned MIDlet suite has a newer MIDlet-Version.

  D. The MIDlet suite with the newer MIDlet-Version is installed.

  Correct Answer: C

• Question 39:

  Which API is guaranteed to be available for use by untrusted MIDlet suites with explicit confirmation from the user?

  A. javax.microedition.io.UDPDatagramConnection

  B. javax.microedition.io.HttpsConnection

  C. javax.microedition.io.SecureConnection

  D. javax.microedition.io.SocketConnection

  Correct Answer: B

• Question 40:

  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. }

  Correct Answer: AC

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