Kotlin MCQs with answers Page - 15

Here, you will find a collection of MCQ questions on Kotlin. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. Which function is used to create an empty list in Kotlin?

  • (A) empty()
  • (B) emptyList()
  • (C) listOf()
  • (D) nullList()

A

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Q. Which Kotlin collection is unordered and does not allow duplicates?

  • (A) List
  • (B) Map
  • (C) Set
  • (D) ArrayList

A

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Q. Which of the following is used to define an extension function?

  • (A) extend fun
  • (B) fun String.name()
  • (C) String.fun name()
  • (D) def extension name()

A

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Q. Which function adds an element to a MutableList in Kotlin?

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

A

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Q. Which keyword is used to indicate a sealed class?

  • (A) sealed
  • (B) restrict
  • (C) closed
  • (D) final

A

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Q. What will be the result of `listOf(1,2,3).reversed()`?

  • (A) [3,2,1]
  • (B) Error
  • (C) [1,2,3]
  • (D) [1,3,2]

A

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Q. Which function checks if all elements in a list satisfy a condition?

  • (A) checkAll()
  • (B) every()
  • (C) all()
  • (D) match()

A

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Q. Which Kotlin operator checks if two references point to the same object?

  • (A) ===
  • (B) ==
  • (C) equals
  • (D) ::

A

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Q. What is the output of `println("Kotlin".substring(0,3))`?

  • (A) KOT
  • (B) Kot
  • (C) Kotl
  • (D) Error

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Q. How do you define an infix function in Kotlin?

  • (A) fun infix name()
  • (B) infix fun name()
  • (C) def infix name()
  • (D) infix() fun name()

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