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Explain how mapreduce works.


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More MapReduce Interview Questions

How to create custom key and custom value in MapReduce Job?

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What is OutputCommitter?

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Why is output file name in Hadoop MapReduce part-r-00000?

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What is the Reducer used for?

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MapReduce Types and Formats and Setting up a Hadoop Cluster?

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Differentiate Reducer and Combiner in Hadoop MapReduce?

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What is the role of recordreader in hadoop mapreduce?

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What is SequenceFileInputFormat?

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What is shuffling and sorting in Hadoop MapReduce?

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What is the next step after Mapper or MapTask?

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How to set the number of reducers?

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What is the fundamental difference between a MapReduce InputSplit and HDFS block?

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