Modify the popTop() method of the linearizable BoundedDEQueue implementation so it will return null only if there
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Question:
Modify the popTop() method of the linearizable BoundedDEQueue implementation so it will return null only if there are no tasks in the queue. Notice that you may need to make its implementation blocking.
Do you expect that the isEmpty() method call of a BoundedDEQueue in the executer pool code will actually improve its performanance ?
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