Object-oriented programming · interview question
Why can exposing a mutable object through a getter method in a class become a real problem?
Multiple choiceMediumchapter-3-curatedpremiumoopaccess-modifiers-and-visibility
Answer and explanation
Correct answer
B. The object can be modified outside the class, affecting its state.
Why
Exposing a mutable object through a getter allows external code to modify the object, potentially leading to unanticipated changes in the class's state. It's important to return defensive copies instead.
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…