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What is a "reducer" in Hadoop?


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More MapReduce Interview Questions

What is MapReduce?

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Define MapReduce?

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What is the next step after Mapper or MapTask?

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How many numbers of reducers run in Map-Reduce Job?

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Where is Mapper output stored?

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What are the benefits of Spark over MapReduce?

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What is Output Format in MapReduce?

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Explain the Reducer's Sort phase?

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List out Hadoop's three configuration files?

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

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Explain the Reducer's reduce phase?

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How can we control particular key should go in a specific reducer?

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