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Exam 1z0-809 topic 1 question 122 discussion

Actual exam question from Oracle's 1z0-809
Question #: 122
Topic #: 1
[All 1z0-809 Questions]

Which two methods from the java.util.stream.Stream interface perform a reduction operation? (Choose two.)

  • A. count ()
  • B. collect ()
  • C. distinct ()
  • D. peek ()
  • E. filter ()
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Suggested Answer: AB 🗳️

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steefaand
5 months, 4 weeks ago
Selected Answer: AB
A and B are correct since reduction must take each element and combine them into single element/value.
upvoted 1 times
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duydn
10 months, 2 weeks ago
Selected Answer: AB
A, B correct. count(): The count() method returns the count of elements in the stream as a long value. It is a terminal operation that reduces the stream to a single value, which is the count of elements. collect(): The collect() method is a more general reduction operation that allows you to accumulate elements of a stream into a mutable result container, such as a List, Set, or Map. It takes a Collector as a parameter, which specifies the rules for accumulating the elements. It is also a terminal operation that reduces the stream to a single value, which is the result of the accumulation.
upvoted 2 times
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samtash1034
2 years, 7 months ago
a and b,tested
upvoted 3 times
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