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Question

What is the purpose of the copy phase in reduce tasks?

a.

To copy the map output data to the local disk

b.

To copy the reduce output data to the distributed file system

c.

To request data partitions from nodes where map tasks ran

d.

To sort the map output data

Posted under Big Data Computing

Answer: (c).To request data partitions from nodes where map tasks ran Explanation:The copy phase in reduce tasks is used to request data partitions from nodes where map tasks ran.

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