Object-oriented programming · interview question
Given the constructor public Order(String id, List<Item> items), what is a potential design improvement?
Multiple choiceMediumchapter-2-curatedpremiumoopconstructors
Answer and explanation
Correct answer
D. Initialize items to a new ArrayList.
Why
Initializing 'items' to a new ArrayList can prevent accidental modification of the list passed to the constructor, enhancing encapsulation by not exposing internal structure.
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…