Card 4 / 76: List four interfaces of the Collections API.
A)
ArrayList, Map, Set, Queue
B)
List, Map, Set, Queue
C)
List, Map, HashSet, PriorityQueue
D)
List, HashMap, HashSet, PriorityQueue
Answer:
B) List, Map, Set, Queue
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A, C, and D are incorrect. ArrayList, HashMap, HashSet, and PriorityQueue are all concrete classes and are considered to be implementations of their respective interfaces.
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