Object-oriented programming · interview question
Consider a class representing a customer's order in an e-commerce application. Which of the following practices helps ensure the class is immutable?
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Answer and explanation
Correct answer
D. Use final fields and provide no setters.
Why
Using final fields and not providing setters ensures that once the order object is created, its state cannot change. This adheres to the principles of immutability, making the object stable and predictable.
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