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What is identity mapper and chain mapper?


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More MapReduce Interview Questions

What is MapReduce?

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What is SequenceFileInputFormat in Hadoop MapReduce?

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What is a distributed cache in mapreduce framework?

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what is a Task Tracker in Hadoop?

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Explain Working of MapReduce?

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How can we control particular key should go in a specific reducer?

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Define Writable data types in MapReduce?

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What is the key- value pair in Hadoop MapReduce?

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What are the advantages of using mapreduce with hadoop?

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What is the need of key-value pair to process the data in MapReduce?

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Clarify what combiners are and when you should utilize a combiner in a map reduce job?

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Where is the output of Mapper written in Hadoop?

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