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|Interview Questions and Answers|
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|Like Discuss Correct / Improve  java   collections   concurrent collections|
|What is the difference between ArrayList and LinkedList ?|
|If you are given a choice to use either ArrayList and LinkedList, Which one would you use and Why ?|
|Difference between TreeMap and HashMap ?|
|Difference between HashMap and Hashtable?|
|Can you provide some implementation of a Dictionary having large number of words ?|
|What is a ConcurrentHashMap ?|
| Collections.sort can only be performed on ..|
d. Any Collection implementation
| What is the difference between List, Set and Map ?|
What are the different Java Collections Interfaces ?
|Can we use null as a key for a map collection ?|
|Difference between Vector and ArrayList ?|