Question
When should a Java developer choose CopyOnWriteArrayList deliberately?
- Use CopyOnWriteArrayList when reads dominate strongly and iteration simplicity matters more than mutation throughput.
- Choose CopyOnWriteArrayList mainly when you want to postpone validation and fix problems manually later.
- Choose CopyOnWriteArrayList whenever you want the code to look more advanced, even if the design gets less clear.
- Choose CopyOnWriteArrayList only to avoid modeling domain rules explicitly in Java code.
Hint
Think about the production scenario where the choice genuinely improves the code.
Answer and rationale
Correct answer: A. Use CopyOnWriteArrayList when reads dominate strongly and iteration simplicity matters more than mutation throughput.
Use CopyOnWriteArrayList when reads dominate strongly and iteration simplicity matters more than mutation throughput. Interviewers often ask this to see whether you can connect the concept to real design decisions.
Track: Java