Kotlin Programming MCQ for Competitive Exams, Interviews, and Certifications

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Each section contains 100 MCQs on Kotlin Program .

In Kotlin, which collection type has an order and can contain duplicate elements?

A) Set B) List C) Map D) All of the above

Discuss

Answer & Solution

Answer: Option B

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

Which collection type ensures element uniqueness in Kotlin?

A) List B) Set C) Map D) MutableList

Discuss

Answer & Solution

Answer: Option B

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

What is the purpose of the init block in Kotlin?

A) to initialize variables B) to define constructors C) to set default values for variables D) to create objects

Discuss

Answer & Solution

Answer: Option A

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

What does the mapOf() function do in Kotlin?

A) It creates a new List. B) It creates a new Set. C) It creates a new Map. D) It creates a new Queue.

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Answer & Solution

Answer: Option C

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

Which of the following is not a valid way to create an object in Kotlin?

A) Using the keyword "new" B) Using the keyword "object" C) Using the keyword "instance" D) Using the keyword "val"

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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 "constructor" in Kotlin?

A) To define the properties B) To initialize the properties C) To define the methods D) To define the class

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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 singleton class in Kotlin?

A) singleton B) object C) static D) final

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Answer & Solution

Answer: Option B

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

What is the difference between a property and a field in Kotlin?

A) A property has a getter/setter B) A property is a variable C) A property is a constant D) A property is a method

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Answer & Solution

Answer: Option A

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

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

A) To define a property or field B) To define a method in subclass C) To define a constructor in subclass D) To define a class in subclass

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Answer & Solution

Answer: Option B

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

What is the difference between a "companion object" and a regular object in Kotlin?

A) Companion object is singleton B) Companion object is inside class C) Companion object has access to private D) All of the above

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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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