Reducer is input the grouped output of a ____________(a) Mapper(b) Reducer(c) Writable(d) ReadableThis question was addressed to me in unit test.This interesting question is from Java Interface topic in portion HDFS – Hadoop Distributed File System of Hadoop

Reducer is input the grouped output of a ____________(a) Mapper(b) Red

1.	Reducer is input the grouped output of a ____________(a) Mapper(b) Reducer(c) Writable(d) ReadableThis question was addressed to me in unit test.This interesting question is from Java Interface topic in portion HDFS – Hadoop Distributed File System of Hadoop
Answer» Correct answer is (a) Mapper To EXPLAIN I would say: In the phase the framework, for each Reducer, fetches the relevant partition of the OUTPUT of all the MAPPERS, via HTTP.

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