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How do ‘map’ and ‘reduce’ work?


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More MapReduce Interview Questions

mapper or reducer?

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Mention Hadoop core components?

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How to set the number of mappers to be created in MapReduce?

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what is WebDAV in Hadoop?

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What counter in Hadoop MapReduce?

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What are the main configuration parameters in a MapReduce program?

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Is it necessary to write a mapreduce job in java?

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How do ‘map’ and ‘reduce’ work?

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What is identity mapper and chain mapper?

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When the reducers are are started in a mapreduce job?

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

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Explain what is “map” and what is "reducer" in hadoop?

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