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Clarify what is shuffling in map reduce?


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More MapReduce Interview Questions

what happens when Hadoop spawned 50 tasks for a job and one of the task failed?

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What do you know about nlineinputformat?

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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 does the conf.setMapper Class do ?

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What are the fundamental configurations parameters specified in map reduce?

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Is YARN a replacement of Hadoop MapReduce?

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

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What is Reduce only jobs?

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When should you use sequencefileinputformat?

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Explain JobConf in MapReduce.

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Explain the Reducer's Sort phase?

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Compare Pig vs Hive vs Hadoop MapReduce?

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