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Exam 1z0-819 topic 1 question 163 discussion

Actual exam question from Oracle's 1z0-819
Question #: 163
Topic #: 1
[All 1z0-819 Questions]

Given:



You want to make the reduction operation parallelized.

Which two modifications will accomplish this?

  • A. Replace line 1 with int sum = numbers.stream() .flatMap(a -> a).reduce (0, (n, m) -> n + m);.
  • B. Replace line 1 with int sum = numbers.stream().iterate (0, a -> a+1).reduce (0, (n, m) -> n + m)
  • C. Replace line 1 with int sum = numbers.parallel ().stream().reduce(0, (n, m) -> n + m)
  • D. Replace line 1 with int sum = numbers.parallelStream().reduce (0, (n, m) -> n + m);.
  • E. Replace line 1 with int sum = numbers.stream().parallel().reduce(0, (n, m) -> n + m)
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Suggested Answer: DE 🗳️
by Stavok at July 21, 2023, 8:30 p.m.

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d7bb0b2
7 months, 4 weeks ago
D, E List is a collection uses a parallelStream() to gnerate a stream parallel E : Stream contains pararell method to generte. stream parallel
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[Removed]
11 months, 1 week ago
Selected Answer: DE
DE is correct
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Stavok
1 year ago
Selected Answer: DE
A List of Integer objects representing numbers is created and assigned to the numbers variable.A Stream is created from the numbers list using either the parallelStream() method or the stream().parallel() method chain. This creates a parallel stream that can process elements concurrently.The reduce() method is called on the parallel stream, passing in an initial value of 0 and a lambda expression that adds two numbers together. This method performs a reduction on the elements of the stream, using the provided identity value and an associative accumulation function.
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