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What is shuffleing in mapreduce?


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More MapReduce Interview Questions

when do reducers play their role in a mapreduce task?

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How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?

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

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What is the key- value pair in MapReduce?

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What happens when a datanode fails ?

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What is mapreduce algorithm?

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What is an input reader in reference to mapreduce?

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Why Mapper runs in heavy weight process and not in a thread in MapReduce?

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For a job in Hadoop, is it possible to change the number of mappers to be created?

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What are the four essential parameters of a mapper?

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What is RecordReader in a Map Reduce?

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What is the core of the job in MapReduce framework?

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