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What data does a Reducer reduce method process?

Posted: Sat Jul 23, 2022 7:30 pm
by answerhappygod
What data does a Reducer reduce method process?

A. All the data in a single input file.
B. All data produced by a single mapper.
C. All data for a given key, regardless of which mapper(s) produced it.
D. All data for a given value, regardless of which mapper(s) produced it.