Online Access Free 1Z0-869 Practice Test

A mobile application developer is trying to increase the performance of a game using the MIDP Game API. Which two are legal, valid approaches that fulfill the developer's goal?
(Choose two.)

• A.base collision detection on rectangle boundaries
• B.poll for key states only when necessary
• C.always ensure that the view window is larger than the visible screen
• D.restrict the number of frames per Sprite to one
• E.implement keyPressed(), keyReleased(), and keyRepeated()

Given: 10. MessageConnection connection;
1 1.
1 2. public void startApp() {
1 3. //...
1 4. connection
1 5. = (MessageConnection) Connector.open("sms://:6222");
1 6. connection.setMessageListener(this);
1 7. // ...
2 8. }
2 9.
3 0. public void notifyIncomingMessage(MessageConnection conn) {
3 1. //...
4 0. }
4 1.
4 2. public void run() {
4 3. Message msg = conn.receive();
4 4. //...
6 0. }
Which two security permissions must this application request to be able to receive messages? (Choose two.)

• A.javax.wireless.messaging.sms.listener
• B.javax.microedition.io.Connector
• C.javax.microedition.io.PushRegistry
• D.javax.wireless.messaging.sms.PushRegistry
• E.javax.wireless.messaging.sms.receive
• F.javax.microedition.io.Connector.sms

Which is a method of ToneControl?

• A.startPlayback()
• B.setLevel()
• C.setSequence()
• D.playTone()

Assuming an application descriptor contains:
MIDlet-Data-Size: 4096
Which is true?

• A.The device will use 4096 bytes to buffer data the application sends over the network.
• B.The device will use 4096 bytes to buffer data the application receives over the network.
• C.The device will permanently reserve 4096 bytes of RMS space for the application.
• D.The device will permanently reserve 4096 bytes of heap space for the application.

When using X.509 PKI, where must a MIDlet suite's security certificates be placed?

• A.in a user-defined subclass of SecurityInfo in the JAR's META-INF directory
• B.inlined in the JAD, using a base64 encoding
• C.in .cer files in the JAR's META-INF directory
• D.inlined in the JAR manifest, using a base64 encoding