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


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More MapReduce Interview Questions

List the network requirements for using Hadoop ?

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Compare Pig vs Hive vs Hadoop MapReduce?

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What is a distributed cache in mapreduce framework?

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What combiners are and when you should use a combiner in a mapreduce job?

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What do you mean by data locality?

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What happens if the quantity of the reducer is 0 in mapreduce?

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How can we assure that the values regarding a particular key goes to the same reducer?

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What are the steps involved in MapReduce framework?

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Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.

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What is identity mapper and chain mapper?

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In Map Reduce why map write output to Local Disk instead of HDFS?

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What is Distributed Cache in the MapReduce Framework?

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