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A number of combiners can be changed or not in MapReduce?


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More MapReduce Interview Questions

How does MapReduce framework view its input internally?

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What does conf.setmapper class do?

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Explain what is “map” and what is "reducer" in hadoop?

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What are the primary phases of a Reducer?

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What are the advantages of using mapreduce with hadoop?

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Explain the Reducer's reduce phase?

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Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?

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How hadoop mapreduce works?

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Why can aggregation not be done in Mapper in MapReduce?

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what is a sequence file in Hadoop?

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What is the default value of map and reduce max attempts?

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Differentiate Reducer and Combiner in Hadoop MapReduce?

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