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Oracle Updated 1z0-809 Exam Questions and Answers by melania

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Oracle 1z0-809 Exam Overview :

Exam Name: Java SE 8 Programmer II
Exam Code: 1z0-809 Dumps
Vendor: Oracle Certification: Java SE
Questions: 196 Q&A's Shared By: melania
Question 8

Given the code fragment:

Questions 8

Which code fragment, when inserted at line 7, enables printing 100?

Options:

A.

Function funRef = e –> e + 10;Integer result = funRef.apply(value);

B.

IntFunction funRef = e –> e + 10;Integer result = funRef.apply (10);

C.

ToIntFunction funRef = e –> e + 10;int result = funRef.applyAsInt (value);

D.

ToIntFunction funRef = e –> e + 10;int result = funRef.apply (value);

Discussion
Question 9

Given the code fragment:

List list1 = Arrays.asList(10, 20);

List list2 = Arrays.asList(15, 30);

//line n1

Which code fragment, when inserted at line n1, prints 10 20 15 30?

Options:

A.

Stream.of(list1, list2).flatMap(list -> list.stream()).forEach(s -> System.out.print(s + “ “));

B.

Stream.of(list1, list2).flatMap(list -> list.intStream()).forEach(s -> System.out.print(s + “ “));

C.

list1.stream().flatMap(list2.stream().flatMap(e1 -> e1.stream()).forEach(s -> System.out.println(s + “ “));

D.

Stream.of(list1, list2).flatMapToInt(list -> list.stream()).forEach(s -> System.out.print(s + “ “));

Discussion
Question 10

Given:

Questions 10

and

Questions 10

Which interface from the java.util.function package should you use to refactor the class Txt?

Options:

A.

Consumer

B.

Predicate

C.

Supplier

D.

Function

Discussion
Question 11

Given the code fragment:

Questions 11

You have been asked to define the ProductCode class. The definition of the ProductCode class must allow c1 instantiation to succeed and cause a compilation error on c2 instantiation.

Which definition of ProductCode meets the requirement?

Options:

A.

B.

C.

D.

Discussion
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