Answer
List: Ordered, allows duplicates.
Set: No duplicates.
Map: Key-value pairs with unique keys.
Set: No duplicates.
Map: Key-value pairs with unique keys.
Quick Answer
List: ordered sequence, allows duplicates, access by index. Set: unordered (HashSet) or sorted (TreeSet), no duplicates - add() returns false if duplicate. Map: key-value pairs, keys are unique (Set semantics for keys), values can duplicate. Use List for ordered data with duplicates, Set for uniqueness enforcement, Map for key-based lookups.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ