1Z0-869 Online Practice Questions and Answers

Click the Task button.

Place each class on its corresponding specification.

Select and Place:

Click the Task button.

Place the API label (high-level or low-level) on the code snippet to indicate whether or not the code is from the high-level or low-level API. Assume that all variable names reflect the object type used in the code.

Select and Place:

Given the push connection string:

MIDlet-Push-1: socket://:79, com.sun.example.SampleChat, 192.3?.?.*

Which two addresses are allowed to push connection notifications to the application? (Choose two.)

A. 192.31.101.1

B. 192.32.1.101

C. 192.310.101.1

D. 192.3.1.101

E. 192.31.1.1

F. 192.310.10.1

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.

Given:

21.

MessageConnection mc;

22.

mc = (MessageConnection) Connector.open("sms://:6222");

23.

mc.setMessageListener(this);

24.

reader = new MsgReader();

25.

new Thread(reader).start();

26.

//...

35.

public void notifyIncomingMessage(MessageConnection mc2) {

36.

//...

40.

}

41.

//...

50.

class MsgReader implements Runnable {

51.

//...

55. }

Which two are true? (Choose two.)

A. This MIDlet uses asynchronous WMA message handling.

B. This MIDlet must have a MIDlet-Push- entry in its JAD file.

C. This MIDlet must contain a call to PushRegister.registerConnection().

D. This MIDlet uses synchronous WMA message handling.

E. This MIDlet typically includes a method call such as: mc.receive().

Given:

DataInputStream incoming = Connector.openDataInputStream("sms://+3125551234:3434"); Which is true?

A. The + in the URL is positioned incorrectly.

B. MessageConnection does NOT support InputStream objects.

C. Port numbers are NOT allowed in SMS URLs.

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

Which is true about a Ticker object?

A. The Ticker can be started and stopped through methods in the API.

B. Direction and speed of scrolling can be controlled through methods in the API.

C. A Ticker may be shared by several Displayable objects.

D. Ticker is a subclass of Screen.

Which three are goals of the CLDC specification? (Choose three.)

A. It is intended to be an application development platform.

B. It is intended as a systems programming environment.

C. It allows device manufacturers to build more extensible devices.

D. It does NOT provide device-specific APIs.

E. It allows developers to port existing applications to mobile devices.

A MIDP 2.0 developer is building a game using the MIDP game API that requires user control over the direction of a Sprite within a GameCanvas. The developer wants to keep performance high and reduce memory use. Which two fulfill the goals? (Choose two.)

A. in the GameCanvas object, use actual key codes rather than mapped game action constants

B. implement keyPressed(), keyReleased(), and keyRepeated()

C. suppress key events for the GameCanvas object

D. poll for the current state of user key input in a loop, using getKeyStates()

What are two benefits of the PushRegistry? (Choose two.)

A. It provides a way for the AMS to automatically invoke a MIDlet at a specified time if it is not already running.

B. It provides a way for an incoming connection to invoke a MIDlet that can handle the content sent by the connection.

C. It provides a way for two MIDlet suites running on the same device to discover and communicate with each other in a secure manner.

D. It provides a way to restrict HTTP connections to well-known network addresses.

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

Given:

50.

class MyGameCanvas extends Canvas {

51.

//...

60.

public MyGameCanvas() {

61.

int width1 = getWidth();

62.

int height1 = getHeight();

63.

//...

70.

setFullScreenMode(true);

71.

//...

80.

int width2 = getWidth();

81.

int height2 = getHeight();

82.

//...

90. }

What is true about width1, height1 and width2, height2?

A. width1 is always equal to width2.

B. The system tries to provide maximum visible area to the MIDlet and these dimensions are width2, height2.

C. The call to setFullScreenMode() is ignored because the dimensions have already been set.

D. height1 is always equal to height2.

Which object or objects must be created to generate a simple tone?

A. A Player and ToneControl must be created.

B. A Player must be created.

C. None. Manager can be used to generate a simple tone.

D. A Player and a PlayerListener must be created.

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

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

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

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

E. Compilation succeeds and the program runs without errors.

What is TimeBase?

A. a top-level MIDP 2.0 interface

B. a top-level MMAPI interface

C. a MIDP 2.0 interface extending the Control interface

D. an MMAPI class implementing the Control interface