Object-oriented programming · interview question
How can you ensure that a collection inside an immutable class cannot be modified?
Multiple choiceHardchapter-3-curatedpremiumoopimmutability-basics
Answer and explanation
Correct answer
A. Return a new unmodifiable collection in the getter.
Why
To maintain immutability, you should return a new unmodifiable collection when a collection is exposed via a getter. This prevents external code from altering the collection's contents.
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