Kotlin MCQs with answers Page - 1

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. What is Kotlin primarily used for?

  • (A) System-level programming
  • (B) Game development only
  • (C) Android app development
  • (D) Hardware programming

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Q. Who developed Kotlin?

  • (A) Google
  • (B) JetBrains
  • (C) Oracle
  • (D) IBM

A

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Q. Which of the following is the correct way to declare a variable in Kotlin?

  • (A) int a = 10;
  • (B) var a = 10
  • (C) val a : int = 10
  • (D) a := 10

A

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Q. What is the difference between 'val' and 'var' in Kotlin?

  • (A) val is mutable, var is immutable
  • (B) val is a function, var is a keyword
  • (C) val is immutable, var is mutable
  • (D) Both are same

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Q. Which of these is used to define a function in Kotlin?

  • (A) function
  • (B) fun
  • (C) def
  • (D) func

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Q. What is a nullable type in Kotlin?

  • (A) A type that is a number
  • (B) A type that can hold a null value
  • (C) A type that holds boolean only
  • (D) A function type

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Q. How do you declare a nullable variable of type String?

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

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Q. Which Kotlin feature allows you to handle null values safely?

  • (A) if-else
  • (B) safe call operator
  • (C) try-catch
  • (D) when

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Q. What will 'val x: Int? = null' do?

  • (A) Throws an error
  • (B) Creates a non-nullable integer
  • (C) Creates a nullable integer that is null
  • (D) Creates a float

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Q. Which keyword is used to create a class in Kotlin?

  • (A) class
  • (B) struct
  • (C) object
  • (D) type

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