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What is identity mapper and identity reducer?


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More MapReduce Interview Questions

Explain job scheduling through JobTracker

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Explain what does the conf.setmapper class do?

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How much space will the split occupy in Mapreduce?

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Where sorting is done on mapper node or reducer node in MapReduce?

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When is it not recommended to use MapReduce paradigm for large

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Compare Pig vs Hive vs Hadoop MapReduce?

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mapper or reducer?

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

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Is it possible to rename the output file?

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What are the various input and output types supported by mapreduce?

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What is shuffling and sorting in Hadoop MapReduce?

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Explain task granularity

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