Objects and Collections - Java Programming Questions and Answers

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Which collection class allows you to access its elements by associating a key with an element's value, and provides synchronization?

java.util.SortedMap

java.util.TreeMap

java.util.TreeSet

java.util.Hashtable

Answer : Option D

Explanation :

Hashtable is the only class listed that provides synchronized methods. If you need synchronization great; otherwise, use HashMap, it's faster.

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