12th Grade Kotlin Quizzes, Questions & Answers

12th Grade

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This Kotlin Object Oriented Programming Quiz evaluates your understanding of core OOP principles in Kotlin, including classes, inheritance, polymorphism, and encapsulation. Designed for advanced learners, it tests your ability to...

Questions: 15 | Attempts: 10 | Last updated: Apr 30, 2026

Sample Question 1
In Kotlin, what keyword is used to define a class that cannot be inherited?

Final

Sealed

Abstract

Private

Sample Question 2
Which of the following correctly demonstrates a primary constructor in Kotlin?

Class Person { constructor(name: String) {} }

Class Person(name: String) {}

Class Person : constructor(name: String) {}

Class Person { fun constructor(name: String) {} }

Sample Question 3
What is the purpose of the 'open' keyword in Kotlin?

To make a class public

To allow a class or function to be overridden

To declare an interface

To create an extension function

12th Grade Kotlin Quizzes, Questions & Answers

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