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Hashmap vs ConcurrentHashMap:Collection interview Ques

The question hashmap vs concurrenthashmap is asked to check whether candidate has understanding of the concept concurrency .
http://javahungry.blogspot.com/2014/02/hashmap-vs-concurrenthashmap-java-collections-interview-question.html

Description:

ifference between hashmap and concurrenthashmap is one of the frequently asked question in technical interviews of java. As we have already discussed another pet question of interview that is how hash map works in java . The question hashmap vs concurrenthashmap is asked to check whether candidate has understanding of the concept concurrency . So if you are about to give interview , then this question should not be missed . Now let us understand the differences between two :

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