_________ is the primary interface for a user to describe a MapReduce job to the Hadoop framework for execution.

A)  JobConf
B)  JobConfig
C)  JobConfiguration
D)  All of the above

Correct Answer :   JobConf

Explanation : JobConf is typically used to specify the Mapper, combiner (if any), Partitioner, Reducer, InputFormat, OutputFormat and OutputCommitter implementations.

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