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Exam 1z0-809 topic 1 question 69 discussion

Actual exam question from Oracle's 1z0-809
Question #: 69
Topic #: 1
[All 1z0-809 Questions]

Given the code fragment:
UnaryOperator<Integer> uo1 = s -> s*2; line n1
List<Double> loanValues = Arrays.asList(1000.0, 2000.0);
loanValues.stream()
.filter(lv -> lv >= 1500)
.map(lv -> uo1.apply(lv))
.forEach(s -> System.out.print(s + " "));
What is the result?

  • A. 4000.0
  • B. 4000
  • C. A compilation error occurs at line n1.
  • D. A compilation error occurs at line n2.
Show Suggested Answer Hide Answer
Suggested Answer: D 🗳️
by adnano1234 at Jan. 14, 2020, 11:01 a.m.

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asdfjhfgjuaDCV
4 months, 3 weeks ago
D is the correct answer
upvoted 1 times
...
steefaand
5 months, 3 weeks ago
Selected Answer: D
Answer D is correct since .map(lv -> uo1.apply(lv)) line fails to compile as uo1 expects Integer, but Double is provided.
upvoted 1 times
...
Innovation
4 years, 6 months ago
A compilation errors at Line 2, because uo1.apply() takes an integer but in map() we are passing a double
upvoted 3 times
...
adnano1234
4 years, 6 months ago
A compilation errors at Line 2 :The method map(Function<? super Double,? extends R>) in the type Stream<Double> is not applicable for the arguments (UnaryOperator<Integer>
upvoted 1 times
...
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