Oracle 1Z0-869 問題集

質問 1：
Which three dimensions of a standard-size application does the JTWI 1.0 specification define? (Choose three.)
A. screen size
B. JAD size
C. RMS data size
D. JAR size
E. heap size
正解：B,C,D

質問 2：
Given:
DateField df = new DateField("Date", DateField.DATE_TIME);
Which requests the width of df to fill available screen space?
A. df.setLayout(Item.LAYOUT_MAXIMUM);
B. df.setLayout(Item.LAYOUT_RIGHT);
C. df.setLayout(Item.LAYOUT_FULL);
D. df.setLayout(Item.LAYOUT_EXPAND);
正解：D

質問 3：
Which three statements are true regarding the handling of wireless connections? (Choose three.)
A. The connection could unexpectedly terminate while processing the input or output streams.
B. Devices can only support one HttpConnection at a time; therefore, network access from multiple threads must be serialized.
C. 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. Network connections should never be performed on a separate thread, so problems can be handled quickly.
E. Performing network operations on the same thread used by the display is likely to block refreshes of the display until the network operations complete.
正解：A,C,E

質問 4：
A MIDlet suite has the application descriptor fragment:
MIDlet-1: E-mail, email.png, com.example.EmailMIDlet
The MIDlet suite has the necessary permissions to use the PushRegistry.
What line does the application descriptor need to register the MIDlet suite for socket push connections on port 79?
A. MIDlet-Push-1: socket://:79, E-mail, *
B. MIDlet-Push-1: socket://:79, com.example.EmailMIDlet, *
C. MIDlet-Push-1: socket://:79, EmailMIDlet, *
D. MIDlet-Push-1: socket://:79, MIDlet-1, *
正解：B

質問 5：
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.socket
MIDlet-Permission: javax.microedition.io.socketserver
D. MIDlet-Permission: javax.microedition.io.socket; javax.microedition.serversocket
E. MIDlet-Permission: javax.microedition.io.Connector.socket
MIDlet-Permission: javax.microedition.io.Connector.serversocket
正解：A

質問 6：
DRAG DROP
Click the Task button.
Place the classes and methods in the correct positions.

正解：


質問 7：
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) {
1 3. byte[] data = new byte[len];
1 4. int actual = is.read(data);
1 5. //...
2 0. } else {
2 1. int ch;
2 2. while ((ch = is.read()) != -1) {
2 3. //...
3 0. }
3 1. }
B. 12. byte[] data = new byte[len];
1 3. int actual = is.read(data);
C. 12. int ch;
1 3. while ((ch = is.read()) != -1) {
1 4. //...
2 0. }
D. 12. int ch;
1 3. while ((ch = is.read()) == -1) {
1 4. //...
2 0. }
正解：A,C

質問 8：
Which two are true about the MIDP user interface API? (Choose two.)
A. There can be multiple Displayable objects shown on the display at the same time.
B. Canvas is a subclass of Screen.
C. All UI events are sent to the application asynchronously.
D. Form is a multicast event source for CommandListener objects.
E. There can be only one Display object per MIDlet.
F. A single Command can have both a long and a short label.
正解：E,F

質問 9：
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. implement keyPressed(), keyReleased(), and keyRepeated()
B. base collision detection on rectangle boundaries
C. restrict the number of frames per Sprite to one
D. poll for key states only when necessary
E. always ensure that the view window is larger than the visible screen
正解：B,D