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__________ controls the partitioning of the keys of the intermediate map-outputs.

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__________ controls the partitioning of the keys of the intermediate map-outputs.

(a) Collector

(b) Partitioner

(c) InputFormat

(d) None of the mentioned

I had been asked this question in an interview for internship.

This interesting question is from Data Flow topic in chapter HDFS – Hadoop Distributed File System of Hadoop

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Correct choice is (b) Partitioner

The explanation is: The output of the mapper is sent to the partitioner.

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