Given a HashMap map, what will map.get(null) return if null is not a key in the map?

Collections · interview question

Given a HashMap<String, Integer> map, what will map.get(null) return if null is not a key in the map?

Multiple choiceMediumchapter-4-curatedpremiumcollectionsmap-interface-and-hashmap

0NullThrows NullPointerExceptionThrows IllegalArgumentException

Answer and explanation

B. Null

In a HashMap, if you use get() with a key that does not exist, it returns null — this includes if the key is null and not present in the map.

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