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|Java - Interview Questions and Answers|
|Ans. ArrayLists aren't synchronized and hence doesn't allow synchronized access. As multiple threads can access an arraylist in parallel, it may result in an inconsistent state.|
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|Like Discuss Correct / Improve  vector  arraylist  list  collections Basic|
|Difference between Vector and ArrayList ?|
|What is the difference between the size and capacity of a Vector?|
|What is meant by "Vector is synchronized and ArrayList isn't " ?|
|When do you use a Vector?|
|Difference between ArrayList and Vector ?|