Multiple choice general knowledge

find the odd one out...

  1. collections

  2. set

  3. list and map

  4. ArrayList
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

ArrayList is a concrete class that implements the List interface, while Collections is a utility class, Set/List/Map are interfaces. The question asks for the 'odd one out' - ArrayList is the only concrete implementation class among the options.

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