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1z0-809 Free downloadExam Code: 1z0-809 Free download
Exam Name: Java SE 8 Programmer II
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1z0-809 Free download Exam Questions Total Q&A: 128 Questions and Answers
Last Update: 12-25,2015

1z0-809 Free download Real Questions Detail : 1z0-809 Free download Exam Questions

 

NO.1 Given the code fragments:
class TechName {
String techName;
TechName (String techName) {
this.techName=techName;
}
}
and
List<TechName> tech = Arrays.asList (
new TechName("Java-"),
new TechName("Oracle DB-"),
new TechName("J2EE-")
);
Stream<TechName> stre = tech.stream();
//line n1
Which should be inserted at line n1 to print Java-Oracle DB-J2EE-?
A. stre.map(a-> a).forEachOrdered(System.out::print);
B. stre.forEach(System.out::print);
C. stre.map(a-> a.techName).forEach(System.out::print);
D. stre.forEachOrdered(System.out::print);
Answer: A

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NO.2 Given:
Class A { }
Class B { }
Interface X { }
Interface Y { }
Which two definitions of class C are valid?
A. Class C implements X, Y extends B { }
B. Class C extends B implements X, Y { }
C. Class C extends A implements X { }
D. Class C implements Y extends B { }
E. Class C extends A, B { }
Answer: B,C

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Explanation:
extends is for extending a class.
implements is for implementing an interface. Java allows for a class to implement many interfaces.

NO.3 Given the code fragment:
Path path6 = Paths.get("/app/./sys/");
Path res1 = path6.resolve("log");
Path path6 = Paths.get("/server/exe/");
Path res1 = path6.resolve("/readme/");
System.out.println(res1);
System.out.println(res2);
What is the result?
A. /app/./sys/log /readme
B. /app/sys/log /readme/server/exe
C. /app/./sys/log /server/exe/readme
D. /app/log/sys /server/exe/readme
Answer: C

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NO.4 Given the code fragment:
class CallerThread implements Callable<String> {
String str;
public CallerThread(String s) {this.str=s;}
public String call() throws Exception {
return str.concat("Call");
}
}
and
public static void main (String[] args) throws InterruptedException, ExecutionException
{
ExecutorService es = Executors.newFixedThreadPool(4); //line n1
Future f1 = es.submit (newCallerThread("Call"));
String str = f1.get().toString();
System.out.println(str);
}
Which statement is true?
A. A compilation error occurs at line n1.
B. An ExecutionException is thrown at run time.
C. The program prints Call Call and terminates.
D. The program prints Call Call and does not terminate.
Answer: D

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