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1. Given:
RecordStore rs = null;
static final String REC_STORE = "appdata"; And, the record store does NOT already exist.
Which is the correct way to open the record store, requesting the record store be created?
A) rs = RecordStore.createRecordStore(REC_STORE);
B) rs = RecordStore.createRecordStore(REC_STORE, 1);
C) rs = RecordStore.openRecordStore(REC_STORE, 1);
D) rs = RecordStore.createRecordStore(REC_STORE, true);
E) rs = RecordStore.openRecordStore(REC_STORE);
F) rs = RecordStore.openRecordStore(REC_STORE, true);
2. Which four are direct subclasses of Screen? (Choose four.)
A) Canvas
B) List
C) TextField
D) Choice
E) TextBox
F) Form
G) Alert
3. A MIDlet makes its only attempt to register a push connection on a JTWI device using:
PushRegistry.registerConnection(
"datagram://:79", midlet, "10.0.0.???");
Which is true?
A) The MIDlet accepts datagram push connections on port 79 only from IP addresses in the range 10.0.0.0 to 10.0.0.255.
B) The MIDlet accepts datagram push connections on port 79 only from IP addresses in the range 10.0.0.100 to 10.0.0.255 and on any other port from IP addresses other than those in the range 10.0.0.100 to 10.0.0.255.
C) The MIDlet accepts datagram push connections on port 79 only from IP addresses in the range 10.0.0.100 to 10.0.0.255.
D) The call to registerConnection() causes an exception, because the
string 10.0.0.??? is an illegal argument.
4. Given the MIDlet code:
11. DatagramConnection dgc
(DatagramConnection)Connector.open("datagram://:444");
1 2. Datagram datagram = dgc.newDatagram(20);
1 3. dgc.receive(datagram);
1 4. byte[] data = datagram.getData();
1 5. String s = new String(data);
1 6. list.append(s, null);
1 7. System.out.println("Datagram received: " + s);
Which two are true regarding the portability of the code between devices? (Choose two.)
A) The code is portable because all the classes and interfaces used are defined in the CLDC.
B) Port 444 may be restricted or ignored by some MIDP implementations.
C) Installation will fail on devices that do not support datagrams.
D) Datagrams may not be supported on all platforms.
5. Which two are true regarding record stores? (Choose two.)
A) Record store names are case insensitive.
B) MIDlets within the same suite CANNOT access the record stores of other MIDlets in the same suite.
C) When a MIDlet suite is removed, record store contents remain on the device.
D) The first created in a record store has a record ID of 1.
E) Record stores can be locked.
F) MIDlets within the same suite can access the record stores of other MIDlets in the same suite.
G) All records within a record store have the same length.
Solutions:
| Question # 1 Answer: F | Question # 2 Answer: B,E,F,G | Question # 3 Answer: C | Question # 4 Answer: B,D | Question # 5 Answer: D,F |
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