Kotlin MCQs with answers Page - 12

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 keyword is used for conditional branching in Kotlin?

  • (A) switch
  • (B) select
  • (C) when
  • (D) case

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Q. What is the correct syntax to define a nullable string?

  • (A) val name: String!
  • (B) val name: ?String
  • (C) val name: String?
  • (D) val name = String?

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Q. How do you check for equality in Kotlin?

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

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Q. How do you compare references (memory address) in Kotlin?

  • (A) ===
  • (B) ==
  • (C) is
  • (D) !=

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Q. Which function creates a mutable list in Kotlin?

  • (A) mutableList()
  • (B) listOfMutable()
  • (C) mutableListOf()
  • (D) listOf()

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Q. What is the base type for Kotlin exception classes?

  • (A) Throwable
  • (B) Exception
  • (C) Error
  • (D) Crash

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Q. Which Kotlin keyword marks a variable that must be initialized later?

  • (A) defer
  • (B) lateinit
  • (C) lazy
  • (D) future

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Q. What is the return type of a Kotlin constructor?

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

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Q. Which operator is used for string concatenation in Kotlin?

  • (A) +
  • (B) &
  • (C) concat
  • (D) ++

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Q. Which keyword is used for inheritance in Kotlin?

  • (A) open
  • (B) extend
  • (C) class
  • (D) implements

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