Language Upgrades · interview question
How can sealed classes be used to enforce architectural constraints in a Java e-commerce application?
Multiple choiceHardchapter-12-curatedpremiumlanguage-upgradessealed-classes
Answer and explanation
Correct answer
C. By allowing only certain payment methods to be subclassed.
Why
In an e-commerce application, sealed classes can enforce architectural constraints by restricting inheritance to specific, vetted classes. For example, only allowing certain payment methods to be subclassed ensures that only trusted and verified implementations are used.
Test yourself on Language Upgrades
A free test with instant, explained results. No account needed.
More Language Upgrades questions
- Which of the following is NOT a valid modifier for a class extending a sealed class?
- How does pattern matching for 'instanceof' improve maintainability in Java?
- What must be true for a class to extend a sealed class and be marked as 'non-sealed'?
- Which Java keyword would you use to specify the classes that can extend a sealed class?
- Given a sealed interface, which of the following is NOT a correct way to implement it?
- Why might an architect choose sealed classes for an e-commerce domain model?