Kotlin MCQs with answers Page - 14

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 of the following is the correct way to declare a data class?

  • (A) data class User(val name: String)
  • (B) class User(val name: String) data
  • (C) val User = data class(name: String)
  • (D) data(User: class String)

A

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Q. What is the return type of a lambda in Kotlin by default?

  • (A) Int
  • (B) Unit
  • (C) Any
  • (D) Void

A

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Q. How do you safely access a property that may be null?

  • (A) property?
  • (B) property!!
  • (C) property.?name
  • (D) property?.name

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Q. Which method returns the index of the first matching element?

  • (A) indexOf()
  • (B) findIndex()
  • (C) firstIndex()
  • (D) search()

A

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Q. Which scope function is used when you need to work with the object and return the result?

  • (A) apply
  • (B) let
  • (C) also
  • (D) do

A

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Q. Which of these is NOT a valid Kotlin keyword?

  • (A) as
  • (B) typeof
  • (C) break
  • (D) when

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Q. How do you define a default parameter in Kotlin?

  • (A) val name = "Guest"
  • (B) name: String = "Guest"
  • (C) name = Guest
  • (D) String name = Guest

A

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Q. What does the 'companion object' in Kotlin do?

  • (A) Creates static methods and properties
  • (B) Initializes variables
  • (C) Declares a singleton
  • (D) Overrides constructors

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Q. Which keyword is used to import classes in Kotlin?

  • (A) use
  • (B) import
  • (C) include
  • (D) require

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Q. Which function returns the last index of a list?

  • (A) endIndex()
  • (B) lastIndex()
  • (C) tailIndex()
  • (D) finalIndex()

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