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Question

When does a map task write its partial output data to disk?

a.

After reading the entire input data

b.

As soon as the circular memory buffer is full

c.

When all map tasks are completed

d.

After merging temporary files

Posted under Big Data Computing

Answer: (b).As soon as the circular memory buffer is full Explanation:A map task writes its partial output data to disk as soon as the circular memory buffer is full.

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