Kotlin Programming MCQ for Competitive Exams, Interviews, and Certifications

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Each section contains 100 MCQs on Kotlin Program .

What is the keyword used to define an interface in Kotlin?

A) abstract B) class C) object D) interface

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Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

What is the syntax for creating a subclass in Kotlin?

A) class Subclass: Superclass B) class Subclass extends Superclass C) class Subclass inherits Superclass D) class Subclass implements Superclass

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Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

How do you define a property in Kotlin that can only be accessed within the same class?

A) Using the keyword "internal" B) Using the keyword "protected" C) Using the keyword "private" D) Using the keyword "local"

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Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

What is the keyword used to define a sealed class in Kotlin?

A) final B) sealed C) closed D) restricted

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Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

What is the keyword used to define an extension function in Kotlin?

A) extend B) fun C) operator D) infix

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Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

What is the keyword used to define a type alias in Kotlin?

A) alias B) typedef C) define D) type

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Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

What is the difference between a "var" and a "val" in Kotlin?

A) var is a mutable variable, while "val" is an immutable variable B) var is a constant, while "val" is a variable C) val is a mutable variable, while "var" is an immutable variable D) val is a constant, while "var" is a variable

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Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

What is the keyword used to define a companion object in Kotlin?

A) object B) class C) companion D) static

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Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

What is the purpose of the "object" keyword in Kotlin?

A) To define a singleton object B) To define a static class C) To define a non-static class D) To define an interface

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Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

100

What is the keyword used to define a constructor in Kotlin?

A) constructor B) new C) create D) init

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Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

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