Oracle Oracle Certifications 1Z0-869 Questions & Answers

• Question 121:

  Given a MIDP 2.0 device supports alpha blending, a MIDlet needs to render semi- transparent images of size 10x10 pixels. However, these images need to be generated at runtime. That is, they CANNOT be loaded as PNGs. What is the correct way to create a 10x10, red, semi-transparent image, using only the MIDP 2.0 API?

  A. This is not possible. An Image with semi-transparency CANNOT be created at runtime.

  B. use createRGBImage() to create an immutable Image from ARGB data with the desired values

  C. use createImage() to create a mutable Image, then fill it with red pixels

  D. use createImage() to create a mutable Image; first fill it with white pixels, then fill it with red pixels

  Correct Answer: B

• Question 122:

  Which two are true regarding a device that implements JTWI? (Choose two.)

  A. The device must implement at least the lowest version of the API as identified by the JTWI specification.

  B. The device may implement a higher version of the API as identified by the JTWI specification.

  C. The device must implement the highest version of the API as identified by the JTWI specification.

  D. The device is NOT required to implement all of the MIDP 2.0 API as identified by the MIDP 2.0 specification.

  Correct Answer: AB

• Question 123:

  A JTWI device has a working socket implementation. A MIDlet requests permission to use socket connections on this device using the attribute MIDlet-Permissions-Opt, but is denied permission. Given:

  20.

  public void connect() {

  21.

  try {

  22.

  String addr = "socket://host.com:79";

  23.

  SocketConnection sc;

  24.

  sc = (SocketConnection) Connector.open(addr);

  25.

  sc.setSocketOption(SocketConnection.LINGER, 5);

  26.

  InputStream is = sc.openInputStream();

  27.

  OutputStream os = sc.openOutputStream();

  28.

  os.write("\\r\\n".getBytes());

  29.

  int ch = is.read();

  30.

  // ...

  35.

  } catch (IOException ioe) {

  36.

  // ...

  40.

  }

  41.

  }

  Which is true assuming that the argument to Connector.open() points to a valid destination, and the device has resources to create new socket connections?

  A. The device disallows the MIDlet to be installed.

  B. If connect() executes, a SecurityException is thrown at runtime at line 26.

  C. If connect() executes, a SecurityException is thrown at runtime at line 28.

  D. If connect() executes, a ConnectionNotFoundException is thrown at runtime at line 24.

  E. If connect() executes, a SecurityException is thrown at runtime at line 24.

  Correct Answer: E

• Question 124:

  Which is false about untrusted MIDlet suites?

  A. Untrusted MIDlet suites may access protected APIs or functions if given explicit user permission.

  B. JTWI devices must treat all MIDP 1.0 suites as untrusted.

  C. JTWI devices must treat all MIDP 2.0 suites as trusted.

  D. An untrusted MIDlet suite does not request permissions explicitly in the JAR manifest or the application descriptor.

  Correct Answer: C

• Question 125:

  Which two are true about record store listeners? (Choose two.)

  A. A record store can have only one registered listener.

  B. When a record store is closed, listeners are removed.

  C. A record store can have more than one registered listener.

  D. Listeners are notified if a record store is deleted.

  E. To listen for all events, three listeners must be registered.

  Correct Answer: BC

• Question 126:

  Given the MIDlet code:

  3.

  public void go() {

  4.

  try {

  5.

  doStuff();

  6.

  } catch(java.lang.IllegalAccessError e) {

  7.

  aForm.append("An Error");

  8.

  }

  9.

  }

  Assuming the aForm variable on line 7 is a correctly initialized Form and set to the current display, what is the result?

  A. An Error is printed to the display if an IllegalAccessError occurs.

  B. Compilation fails due to a problem on line 7.

  C. The MIDlet fails at runtime due to a problem on line 6.

  D. The MIDlet fails at runtime due to a problem on line 7.

  E. Compilation fails due to a problem on line 6.

  Correct Answer: E

• Question 127:

  Which three APIs may untrusted MIDlets use without explicit confirmation by the user? (Choose three.)

  A. javax.microedition.rms

  B. javax.microedition.media

  C. javax.microedition.io.PushRegistry

  D. javax.microedition.lcdui

  E. javax.microedition.io.HttpConnection

  Correct Answer: ABD

• Question 128:

  Given:

  7.

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

  8.

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

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

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

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

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

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

  Correct Answer: A

• Question 129:

  Which three classes are subclasses of Item? (Choose three.)

  A. List

  B. Alert

  C. TextBox

  D. TextField

  E. Gauge

  F. ChoiceGroup

  G. Form

  Correct Answer: DEF

• Question 130:

  Which URL indicates the intention for one JTWI device to communicate with another JTWI device?

  A. cbs://+18005551234

  B. cbs://+18005551234:1234

  C. sms://+18005551234:1234

  D. sms://+18005551234

  Correct Answer: C