Question
When should a Java developer choose List, Set, and Map deliberately?
- Choose List, Set, and Map mainly when you want to postpone validation and fix problems manually later.
- Choose List, Set, and Map whenever you want the code to look more advanced, even if the design gets less clear.
- Use a Set for de-duplication, a List for ordered iteration, and a Map for fast keyed lookup.
- Choose List, Set, and Map 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: C. Use a Set for de-duplication, a List for ordered iteration, and a Map for fast keyed lookup.
Use a Set for de-duplication, a List for ordered iteration, and a Map for fast keyed lookup. Interviewers often ask this to see whether you can connect the concept to real design decisions.
Track: Java