FAQs on #8.7 Kotlin Object Oriented Concepts: Visibility Modifiers - public; protected; internal and private

Question 1

1. What are visibility modifiers in Kotlin?

Accepted Answer

Ans. Visibility modifiers in Kotlin are used to control the visibility or accessibility of classes, objects, functions, properties, and constructors within a module or package. There are four visibility modifiers in Kotlin: public, protected, internal, and private.

Question 2

2. What is the purpose of the public visibility modifier in Kotlin?

Accepted Answer

Ans. The public visibility modifier is the default modifier in Kotlin. It allows the entity to be accessed from any part of the codebase, including other modules and packages. By using the public modifier, we make the entity visible and accessible to all.

Question 3

3. How does the protected visibility modifier differ from the public modifier in Kotlin?

Accepted Answer

Ans. The protected visibility modifier in Kotlin allows the entity to be accessed within the same class or its subclasses. It restricts the access from other classes or packages. Unlike the public modifier, protected visibility is not accessible from outside the inheritance hierarchy.

Question 4

4. Explain the internal visibility modifier in Kotlin.

Accepted Answer

Ans. The internal visibility modifier in Kotlin allows the entity to be accessed within the same module. It restricts the access from other modules or packages. The internal modifier is useful when we want to expose an entity only within a specific module and hide it from other parts of the codebase.

Question 5

5. What is the purpose of the private visibility modifier in Kotlin?

Accepted Answer

Ans. The private visibility modifier in Kotlin restricts the access to the entity within the same class or file. It makes the entity visible only within its declaration scope, preventing other classes or packages from accessing it. The private modifier is useful when we want to encapsulate the implementation details and ensure data privacy.

#8.7 Kotlin Object Oriented Concepts Visibility Modifiers - public; protected;

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