Clarify what is shuffling in map reduce?


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More MapReduce Interview Questions

What is the role of a MapReduce partitioner?

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Why do we need MapReduce during Pig programming?

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

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What is the difference between Job and Task in MapReduce?

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In Map Reduce why map write output to Local Disk instead of HDFS?

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What is the process of changing the split size if there is limited storage space on Commodity Hardware?

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What is identity mapper and reducer? In which cases can we use them?

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What is shuffling and sorting in mapreduce?

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What is InputFormat in Hadoop MapReduce?

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How to submit extra files(jars, static files) for Hadoop MapReduce job during runtime?

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How to handle record boundaries in Text files or Sequence files in MapReduce InputSplits?

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What is difference between an input split and hdfs block?

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