What is an identity mapper and identity reducer?


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More MapReduce Interview Questions

What is Distributed Cache in the MapReduce Framework?

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What are combiners? When should I use a combiner in my MapReduce Job?

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Can we set the number of reducers to zero in MapReduce?

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What happens when a datanode fails ?

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What do you understand by the term Straggler ?

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how JobTracker schedules a task ?

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What combiners is and when you should use a combiner in a MapReduce Job?

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What is MapReduce?

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What Are Good Use Cases For Impala As Opposed To Hive Or MapReduce?

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When Namenode is down what happens to job tracker?

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What is Counter in MapReduce?

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Explain the process of spilling in Hadoop MapReduce?

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