Question

In the MapReduce model, what is the purpose of the map() function?

a.

It computes the final result of the application.

b.

It divides the problem into two stages.

c.

It applies a function to every element of the input.

d.

It groups key-value pairs for parallel processing.

Posted under Big Data Computing

Answer: (c).It applies a function to every element of the input. Explanation:The map() function in the MapReduce model applies a function to every element of the input and emits key-value pairs to be processed later during the reduce stage.

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Q. In the MapReduce model, what is the purpose of the map() function?

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