A

Admin • 828.03K Points
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Q. Which of these maps throws a `NullPointerException` when `null` is used as a key?

  • (A) HashMap
  • (B) TreeMap
  • (C) LinkedHashMap
  • (D) ConcurrentHashMap
  • Correct Answer - Option(D)
  • Views: 11
  • Filed under category Java
  • Hashtags: Java Map
Explanation by: Admin
ConcurrentHashMap does not allow null keys or null values.

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