Kotlin Programming MCQ for Competitive Exams, Interviews, and Certifications

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Each section contains 100 MCQs on Kotlin Program .

How do you create a single-line comment in Kotlin?

A) // This is a comment B) /* This is a comment */ C) # This is a comment D) None of these

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Answer & Solution

Answer: Option A

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

What does a data class not offer?

A) A generated copy(...) method, to create copies of instances B) An auto-generated toString() method C) Anto-generated hashCode() and equals() methods D) Automatic conversion from/to JSON

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Answer & Solution

Answer: Option D

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

What is the correct way to initialize a nullable variable?

A) val name = null B) var name: String C) val name: String D) val name: String? = null

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Answer & Solution

Answer: Option D

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

What is a companion object in Kotlin?

A) An object that is used to store constants B) An object that is used to represent data structures C) An object that is used to create instances of a class D) An object that is used to define static members of a class

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Answer & Solution

Answer: Option D

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

In Kotlin, default modifier is?

A) public B) private C) sealed D) protected

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Answer & Solution

Answer: Option A

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

What is the default constructor in Kotlin?

A) primary constructor B) secondary constructor C) explicit constructor D) implicit constructor

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Answer & Solution

Answer: Option D

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Does Kotlin use the "static" keyword?

A) No B) Yes

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Answer & Solution

Answer: Option A

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What is an immutable variable?

A) A variable that cannot change, read-only B) A variable used for string interpolation C) A variable that can be changed D) None of these

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Answer & Solution

Answer: Option A

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What are varargs in Kotlin?

A) Varargs are the parameters that enable the number of arguments sent to the function. B) Varargs are a special kind of collection in Kotlin. C) Varargs is a synonym for the primitives in Kotlin. D) None of these

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Answer & Solution

Answer: Option A

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

Are semicolons (;) mandatory at the end of code statements in Kotlin?

A) TRUE B) FALSE

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Answer & Solution

Answer: Option B

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

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