What is the difference between Reducer and Combiner in Hadoop MapReduce?


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More MapReduce Interview Questions

Explain the difference between a MapReduce InputSplit and HDFS block?

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How data is spilt in Hadoop?

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What is an input reader in reference to mapreduce?

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

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what is storage and compute nodes?

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Differentiate Reducer and Combiner in Hadoop MapReduce?

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What is Distributed Cache in the MapReduce Framework?

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Define speculative execution?

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Explain the process of spilling in MapReduce?

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Mention Hadoop core components?

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What is KeyValueTextInputFormat in Hadoop MapReduce?

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What are the steps involved in MapReduce framework?

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