Java Interview Questions · interview question
When should a Java developer choose List, Set, and Map deliberately?
Multiple choiceMediumjava-interview-2026interviewjavause
Answer and explanation
Correct answer
A. Use a Set for de-duplication, a List for ordered iteration, and a Map for fast keyed lookup.
Why
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.
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