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What is a "reducer" in Hadoop?


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More MapReduce Interview Questions

When is it suggested to use a combiner in a MapReduce job?

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What is a Distributed Cache in Hadoop?

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what happens in textinformat ?

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Explain what does the conf.setmapper class do?

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What is InputFormat in Hadoop MapReduce?

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Explain what is shuffling in mapreduce?

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Mention Hadoop core components?

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

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what is a sequence file in Hadoop?

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In Hadoop, which file controls reporting in Hadoop?

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How to specify more than one directory as input in the Hadoop MapReduce Program?

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What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?

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