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What is an identity mapper and identity reducer?


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More MapReduce Interview Questions

What are the primary phases of a Reducer?

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What are the data components used by Hadoop?

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Explain the process of spilling in MapReduce?

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What happens when the node running the map task fails before the map output has been sent to the reducer?

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Developing a MapReduce Application?

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When should you use a reducer?

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What do you mean by inputformat?

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Difference between mapreduce and spark

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Why MapReduce uses the key-value pair to process the data?

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what is NameNode in Hadoop?

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What is the relation between MapReduce and Hive?

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Mention what is the hadoop mapreduce apis contract for a key and value class?

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