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What is the need of key-value pair to process the data in MapReduce?


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More MapReduce Interview Questions

when do reducers play their role in a mapreduce task?

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

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What MapReduce framework consists of?

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What is the Reducer used for?

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What is the best way to copy files between HDFS clusters?

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How do ‘map’ and ‘reduce’ work?

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Why can aggregation not be done in Mapper in MapReduce?

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How is Spark not quite the same as MapReduce? Is Spark quicker than MapReduce?

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What are the four essential parameters of a mapper?

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Explain what is distributed cache in mapreduce framework?

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what does the text input format do?

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What is Counter in MapReduce?

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