Which is not a phase of a map and reduce operation? A A WHERE clause is called to provide input records. B A map function is called to parse, extract, and filter the records to produce an output. (C) Outputs are grouped according to keys.   D A reduce function is performed on each group of map outputs with the same key.

Programming Logic & Design Comprehensive
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ISBN:9781337669405
Author:FARRELL
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Chapter7: File Handling And Applications
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Which is not a phase of a map and reduce operation?

A A WHERE clause is called to provide input records.

B A map function is called to parse, extract, and filter the records to produce an output.

(C) Outputs are grouped according to keys.

 

D A reduce function is performed on each group of map outputs with the same key.

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