1z0-809 最新試験 - Java SE 8 Programmer II


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1z0-809試験番号:1z0-809 参考資料
試験科目:「Java SE 8 Programmer II」

>> 1z0-809 参考資料


NO.1 Which two statements are true about localizing an application?
A. Language codes use lowercase letters and region codes use uppercase letters.
B. Textual elements (messages and GUI labels) are hard-coded in the code.
C. Support for new regional languages does not require recompilation of the code.
D. Language and region-specific programs are created using localized data.
E. Resource bundle files include data and currency information.
Answer: A,C

1z0-809 学習   
Reference: http://docs.oracle.com/javase/7/docs/technotes/guides/intl/

NO.2 Given:
Which two classes use the shape class correctly?
A. Option D
B. Option E
C. Option F
D. Option C
E. Option A
F. Option B
Answer: B,F

1z0-809 短期   1z0-809 ガイド   
When an abstract class is subclassed, the subclass usually provides implementations for all of the
abstract methods in its parent class (E). However, if it does not, then the subclass must also be
declared abstract (B). Note: An abstract class is a class that is declared abstract-it may or may not
include abstract methods. Abstract classes cannot be instantiated, but they can be subclassed.

NO.3 Given:
Class A { }
Class B { }
Interface X { }
Interface Y { }
Which two definitions of class C are valid?
A. Class C extends B implements X, Y { }
B. Class C implements X, Y extends B { }
C. Class C extends A implements X { }
D. Class C extends A, B { }
E. Class C implements Y extends B { }
Answer: A,C

1z0-809 初心者   
extends is for extending a class.
implements is for implementing an interface. Java allows for a class to implement many interfaces.

NO.4 Given the code fragments:
class Caller implements Callable<String> {
String str;
public Caller (String s) {this.str=s;}
public String call()throws Exception { return str.concat ("Caller");}
class Runner implements Runnable {
String str;
public Runner (String s) {this.str=s;}
public void run () { System.out.println (str.concat ("Runner"));}
public static void main (String[] args) InterruptedException, ExecutionException {
ExecutorService es = Executors.newFixedThreadPool(2);
Future f1 = es.submit (new Caller ("Call"));
Future f2 = es.submit (new Runner ("Run"));
String str1 = (String) f1.get();
String str2 = (String) f2.get();//line n1
System.out.println(str1+ ":" + str2);
What is the result?
A. The program terminates after printing:
Run Runner
Call Caller : Run
B. The program prints:
Run Runner
Call Caller : null
And the program does not terminate.
C. An Execution is thrown at run time.
D. A compilation error occurs at line n1.
Answer: B

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