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Core java - Interview Questions and Answers for 'Blackberry' - 1 question(s) found - Order By Newest

 Q1. Can we use null as a key for a map collection ?Core Java
Anonymous
Ans. Yes , for HashMap. HashMap implements Map interface. HashMap allows one null key and any number of null values.

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   Like      Discuss      Correct / Improve     java   collections   hashmap   map   hashtable   yes-no     BlackBerry


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