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Actual exam question from Oracle's 1z0-809
Question #: 2
Topic #: 2
[All 1z0-809 Questions]

Given:
IntStream stream = IntStream.of (1,2,3);
IntFunction<Integer> inFu= x -> y -> x*y; //line n1
IntStream newStream = stream.map(inFu.apply(10)); //line n2 newStream.forEach(System.output::print);
Which modification enables the code fragment to compile?
line n1 with:

  • A. Replace IntFunction<UnaryOperator> inFu = x -> y -> x*y; line n1 with:
  • B. Replace IntFunction<IntUnaryOperator> inFu = x -> y -> x*y; line n1 with:
  • C. Replace BiFunction<IntUnaryOperator> inFu = x -> y -> x*y; line n2 with:
  • D. Replace
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Suggested Answer: D 🗳️
by Pasci at May 24, 2020, 5:14 p.m.

Comments

Chosen Answer:
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Pasci
Highly Voted 4 years ago
B is correct: IntFunction<IntUnaryOperator> inFu = x -> y -> x*y;
upvoted 7 times
...
DarGrin
Most Recent 4 days, 21 hours ago
Selected Answer: B
Answer is B. IntStream.map() takes an IntUnaryOperator
upvoted 1 times
...
iSnover
4 months ago
Selected Answer: B
B is correct: IntFunction<IntUnaryOperator> inFu = x -> y -> x*y;
upvoted 1 times
...
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