Java Streams MCQs with answers Page - 1

You will find multiple-choice questions (MCQs) related to #Java Streams here. Go through these questions to prepare effectively for your upcoming exams and interviews.

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A

Admin • 802.91K Points
Coach

Q. Which method is used to transform elements in a Stream?

  • (A) filter()
  • (B) map()
  • (C) forEach()
  • (D) collect()

A

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Coach

Q. What does the filter() method do in a Stream?

  • (A) Filters based on a condition
  • (B) Sorts the stream
  • (C) Transforms data
  • (D) Reduces the stream

A

Admin • 802.91K Points
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Q. Which method converts a Stream into a List?

  • (A) toList()
  • (B) collect(Collectors.toList())
  • (C) toArray()
  • (D) convertToList()

A

Admin • 802.91K Points
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Q. Which Stream method is used to perform an action for each element?

  • (A) collect()
  • (B) map()
  • (C) forEach()
  • (D) reduce()

A

Admin • 802.91K Points
Coach

Q. Which operation is terminal in Stream API?

  • (A) map()
  • (B) filter()
  • (C) limit()
  • (D) collect()

A

Admin • 802.91K Points
Coach

Q. Which method returns the count of elements in the Stream?

  • (A) size()
  • (B) count()
  • (C) length()
  • (D) total()

A

Admin • 802.91K Points
Coach

Q. Which method is used to sort elements of a Stream?

  • (A) sort()
  • (B) arrange()
  • (C) sorted()
  • (D) orderBy()

A

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Q. Which method limits the number of elements in the stream?

  • (A) cap()
  • (B) restrict()
  • (C) limit()
  • (D) slice()

A

Admin • 802.91K Points
Coach

Q. What is a terminal operation in a stream?

  • (A) An operation that ends stream processing
  • (B) An operation that filters the stream
  • (C) An operation that sorts the stream
  • (D) An operation that maps the stream

A

Admin • 802.91K Points
Coach

Q. What is the use of `reduce()` in streams?

  • (A) To reduce stream size
  • (B) To perform aggregation
  • (C) To filter elements
  • (D) To convert to list

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