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What is a "map" in Hadoop?


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More MapReduce Interview Questions

What is identity mapper and chain mapper?

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Difference between mapreduce and spark

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What is SequenceFileInputFormat in Hadoop MapReduce?

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How to set the number of mappers for a MapReduce job?

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What happen if the number of the reducer is 0 in MapReduce?

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What are mapreduce new and old apis while writing map reduce program?. Explain how it works

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What is Counter in MapReduce?

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How to change the name of the output file from part-r-00000 in Hadoop MapReduce?

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What is the difference between an RDBMS and Hadoop?

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what is distributed cache in mapreduce framework?

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What do you mean by shuffling and sorting in MapReduce?

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How do reducers communicate with each other?

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