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Interface ____________ reduces a set of intermediate values which share a key to a smaller set of values.

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Interface  ____________ reduces a set of intermediate values which share a key to a smaller set of values.

(a) Mapper

(b) Reducer

(c) Writable

(d) Readable

The question was posed to me in unit test.

The doubt is from Java Interface in section HDFS – Hadoop Distributed File System of Hadoop

1 Answer

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Best answer
Correct answer is (b) Reducer

The explanation: Reducer implementations can access the JobConf for the job.

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