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What is mapper in map reduce?


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More MapReduce Interview Questions

what job does the conf class do?

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What is the job of blend () and repartition () in Map Reduce?

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What is SequenceFileInputFormat?

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What Are Good Use Cases For Impala As Opposed To Hive Or MapReduce?

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What is the need of MapReduce in Hadoop?

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How to write a custom partitioner for a Hadoop MapReduce job?

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What is difference between a MapReduce InputSplit and HDFS block

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Explain about the partitioning, shuffle and sort phase in MapReduce?

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What does a 'MapReduce Partitioner' do?

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Explain what does the conf.setMapper Class do in MapReduce?

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Explain how mapreduce works.

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Describe what happens to a mapreduce job from submission to output?

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