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Encapsulation helps in writing ___________ classes in java.

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Encapsulation helps in writing ___________ classes in java.

(a) Mutable

(b) Abstract

(c) Wrapper

(d) Immutable

I have been asked this question during an internship interview.

Asked question is from Encapsulation in section OOPs Concept & Features of Object Oriented Programming

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Correct answer is (d) Immutable

Easy explanation - Immutable classes are used for caching purpose generally. And it can be created by making the class as final and making all its members private.

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