Java Set MCQs with answers Page - 1

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

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Q. Which interface does the Set interface extend?

  • (A) Map
  • (B) Collection
  • (C) List
  • (D) Queue

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Q. Which class implements Set and does not guarantee any specific order?

  • (A) TreeSet
  • (B) LinkedHashSet
  • (C) HashSet
  • (D) SortedSet

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Q. Which Set implementation maintains insertion order?

  • (A) TreeSet
  • (B) HashSet
  • (C) LinkedHashSet
  • (D) EnumSet

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Q. Which Set implementation stores elements in sorted (natural) order?

  • (A) HashSet
  • (B) LinkedHashSet
  • (C) TreeSet
  • (D) SortedSet

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Q. Which method is used to add an element to a Set?

  • (A) put()
  • (B) insert()
  • (C) add()
  • (D) push()

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Q. Which of these Set types allows null elements?

  • (A) HashSet
  • (B) TreeSet
  • (C) EnumSet
  • (D) None of these

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Q. What will happen if you add duplicate values to a Set?

  • (A) They are added
  • (B) Error is thrown
  • (C) They are ignored
  • (D) They are replaced

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Q. Which Set implementation provides constant-time performance for basic operations like add, remove, and contains?

  • (A) TreeSet
  • (B) HashSet
  • (C) LinkedHashSet
  • (D) EnumSet

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Q. Which class implements a set using a Red-Black tree?

  • (A) HashSet
  • (B) TreeSet
  • (C) LinkedHashSet
  • (D) EnumSet

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Q. Which method is used to remove a specific element from a Set?

  • (A) delete()
  • (B) remove()
  • (C) clear()
  • (D) pop()

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