Question at position 1 What are the three Collection interfaces?Map, List, ArrayMap, ArrayList, LinkedListList, Set, QueueList, Set, Map

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Question at position 1 What are the three Collection interfaces?Map, List, ArrayMap, ArrayList, LinkedListList, Set, QueueList, Set, Map

BlackTom AI · Accepted Answer

Question: What are the three Collection interfaces? Map, List, ArrayMap, ArrayList, LinkedListList, Set, QueueList, Set, Map

Option 1: 'Map, List, Array' — This mixes a specific class (Array) with interfaces, and includes Map which is not a Collection interface. It does not accurately represent the standard trio of core collection interfaces.

Option 2: 'Map, ArrayList, LinkedList' — This lists Map and concrete implementations (ArrayList, LinkedList) rather than the abstract interfaces. Since the prompt asks for interfaces, this option misidentifies the concept by mixing interfaces with implementations.

Option 3: 'List, Set, Queue' — This option names three fundamental interfaces provided by the Java Collections Framework that are all subtypes of the Collection interface. They cover ordered collections (List), unordered/unique element collections (Set), and a first-in-first-out (FIFO) queuing interface (Queue).

Option 4: 'List, Set, Map' — While List and Set are indeed Collection interfaces, Map is not a subtype of Collection; it is a separate interface representing a mapping of keys to values, and thus does not belong to the trio of Collection interfaces.

Additional notes: Understanding the distinction between interfaces in java.util is essential. The Collection family includes List, Set, and Queue as core interfaces that describe different ways of organizing elements, whereas Map is a separate type that models key-value associations. Recognizing this separation helps in choosing the right abstraction for a given data structure and its operations.

Question at position 1 What are the three Collection interfaces?Map, List, ArrayMap, ArrayList, LinkedListList, Set, QueueList, Set, Map单项选择题

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