Kotlin MCQs with answers Page - 10

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 class in Kotlin represents no value?

  • (A) Null
  • (B) Nothing
  • (C) Unit
  • (D) None

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Q. Which of these is a Kotlin escape sequence for a new line?

  • (A) \r
  • (B) \n
  • (C) \b
  • (D) \t

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Q. What does `?.` represent in Kotlin?

  • (A) Non-null call
  • (B) Safe call operator
  • (C) Elvis operator
  • (D) Type cast

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Q. What does `!!` mean in Kotlin?

  • (A) Safe call
  • (B) Nullable type
  • (C) Non-null assertion
  • (D) Logical NOT

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Q. Which function gets the number of elements in a collection?

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

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Q. How do you write a comment in Kotlin?

  • (A) # comment
  • (B) // comment
  • (C) -- comment
  • (D) <!-- comment -->

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Q. What does `as?` do in Kotlin?

  • (A) Casts to a type unsafely
  • (B) Performs null-safe type casting
  • (C) Converts to string
  • (D) Concatenates strings

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Q. Which keyword is used to exit a loop in Kotlin?

  • (A) stop
  • (B) exit
  • (C) break
  • (D) halt

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Q. Which function is used to delay execution in coroutines?

  • (A) wait()
  • (B) pause()
  • (C) delay()
  • (D) sleep()

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Q. Which of these is a correct way to create a set in Kotlin?

  • (A) createSet(1, 2, 3)
  • (B) setOf(1, 2, 3)
  • (C) Set(1, 2, 3)
  • (D) makeSet(1, 2, 3)

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