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What are the four basic parameters of a reducer?


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More MapReduce Interview Questions

How does Mappers run method works?

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In MapReduce how to change the name of the output file from part-r-00000?

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In mapreduce what is a scarce system resource? Explain?

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Explain how do ‘map’ and ‘reduce’ work?

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How to optimize MapReduce Job?

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Where is Mapper output stored?

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What do sorting and shuffling do?

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Why Hadoop MapReduce?

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What is a MapReduce Combiner?

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What is the sequence of execution of map, reduce, recordreader, split, combiner, partitioner?

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What are the key differences between Pig vs MapReduce?

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what is JobTracker in Hadoop? What are the actions followed by Hadoop?

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