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What are the four essential parameters of a mapper?


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More MapReduce Interview Questions

Explain Working of MapReduce?

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For a Hadoop job, how will you write a custom partitioner?

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What is the best way to copy files between HDFS clusters?

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Define MapReduce?

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What is SequenceFileInputFormat?

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What is shuffleing in mapreduce?

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What is the InputSplit in map reduce ?

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What is shuffling and sorting in mapreduce?

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What is OutputCommitter?

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What is shuffling in mapreduce?

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When is it not recommended to use MapReduce paradigm for large scale data processing?

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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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