Question

What does the Map function do in a MapReduce program?

a.

It reduces the data volume.

b.

It filters and transforms the input data.

c.

It stores data in partitions.

d.

It schedules tasks on different nodes.

Posted under Big Data Computing

Answer: (b).It filters and transforms the input data. Explanation:The Map function reads a set of "records" from an input file, does any desired filtering or transformations, and then outputs a set of intermediate records by processing the input data.

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Q. What does the Map function do in a MapReduce program?

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