Java Streams MCQs with answers Page - 4

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A

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Q. Which method checks if no elements in the stream match a predicate?

  • (A) anyMatch()
  • (B) noneMatch()
  • (C) noMatch()
  • (D) zeroMatch()

A

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Q. Which Stream type is unordered by default?

  • (A) IntStream
  • (B) List.stream()
  • (C) Set.stream()
  • (D) Map.stream()

A

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Q. Which method converts a primitive stream to a boxed stream?

  • (A) boxed()
  • (B) wrap()
  • (C) toBoxed()
  • (D) convert()

A

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Q. How do you create an infinite stream?

  • (A) Stream.infinite()
  • (B) Stream.generate()
  • (C) Stream.loop()
  • (D) Stream.unbounded()

A

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Q. Which method is used to execute stream operations in parallel?

  • (A) parallel()
  • (B) multiStream()
  • (C) split()
  • (D) asParallel()

A

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Q. Which method converts a Stream into a Set?

  • (A) collect(Collectors.toSet())
  • (B) toSet()
  • (C) stream().set()
  • (D) set()

A

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Q. Which method converts a List to a Stream?

  • (A) stream()
  • (B) toStream()
  • (C) listToStream()
  • (D) streamFromList()

A

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Q. Which of the following Stream operations is most suitable for counting elements matching a condition?

  • (A) count()
  • (B) size()
  • (C) sum()
  • (D) collect()

A

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Q. Which method returns the default value without inserting a new key?

  • (A) get()
  • (B) setdefault()
  • (C) pop()
  • (D) None of these

A

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Q. What does the `findAny()` method return?

  • (A) First element of the stream
  • (B) Any element, possibly the first, wrapped in Optional
  • (C) All matching elements
  • (D) Null

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