Ace Java 2025: Rock Your 'Thinking in Java' Challenge!

Question: 1 / 510

Which of these is not a direct subtype of Collection?

Set

List

Queue

Map

All of the options are subtypes of Collection except for D Map. A Set is a subtype of Collection because it allows for multiple unique elements to be stored and does not allow for duplicates. A List is a subtype of Collection because it allows for a sequence of elements to be stored and allows for duplicates. A Queue is a subtype of Collection because it stores elements in a first-in, first-out manner. However, a Map is not a subtype of Collection because it does not store elements in a collection-like manner, but rather stores entries in a key-value pair format.

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