Language Upgrades · interview question
In what situation might a sealed class hierarchy be particularly beneficial in a large legacy application?
Multiple choiceHardchapter-12-curatedpremiumlanguage-upgradesmigration-strategy
Answer and explanation
Correct answer
B. When you need to prevent external libraries from extending your classes
Why
Sealed classes allow developers to define a fixed set of subclasses, which can be particularly useful in large applications to enforce strict control over the class hierarchy, ensuring that only known implementations are used.
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