Latest Oracle 1Z0-809 Dumps - 1Z0-809 Real Exam Questions Answers
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Sample Question #1
Given the code fragment:
List values = Arrays.asList (1, 2, 3);
values.stream ()
.map(n -> n*2)//line n1
.peek(System.out::print)//line n2
.count();
What is the result?
A. 246
B. The code produces no output.
C. A compilation error occurs at line n1.
D. A compilation error occurs at line n2.
Answer: A 
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Sample Question #2
Which two reasons should you use interfaces instead of abstract classes? (Choose two.)
A. You expect that classes that implement your interfaces have many common methods or fields, or
require access modifiers other than public.
B. You expect that unrelated classes would implement your interfaces.
C. You want to share code among several closely related classes.
D. You want to declare non-static on non-final fields.
E. You want to take advantage of multiple inheritance of type.
Answer: B,E 
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Sample Question #3
Given the code fragment:
Stream iStr= Stream.of (
Arrays.asList (“1”, “John”),
Arrays.asList (“2”, null)0;
Stream x.stream ());
nInSt.forEach (System.out :: print);
What is the result?
A. 1John2null
B. 12
C. A NullPointerException is thrown at run time.
D. A compilation error occurs.
Answer: D 
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