Object-oriented programming · interview question
Why should a class's internal state not be exposed via public mutable fields?
Multiple choiceHardchapter-3-curatedpremiumoopaccess-modifiers-and-visibility
Answer and explanation
Correct answer
C. It breaks encapsulation and can lead to inconsistent states
Why
Exposing internal state via public mutable fields breaks encapsulation, allowing external code to modify the state directly. This can lead to inconsistent states and makes it difficult to maintain the class's invariants.
Test yourself on Object-oriented programming
A free test with instant, explained results. No account needed.
More Object-oriented programming questions
- What happens if a subclass does not implement all abstract methods from its abstract superclass?
- What does the 'this' keyword refer to within an instance method of a class?
- Which Java keyword would you use to declare an abstract class in Java?
- Which statement correctly creates an instance of the 'Product' class?
- How does using interfaces in Java promote flexibility in application design?
- In Java, why might composition be preferred over inheritance when designing a class to calculate discounts for…