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What is the utility of using Writable Comparable Custom Class in Map Reduce code?


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More MapReduce Interview Questions

How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?

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How to set the number of mappers for a MapReduce job?

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Can you tell us how many daemon processes run on a hadoop system?

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What is heartbeat in hdfs? Explain.

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What is the need of MapReduce?

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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 the sequence of execution of Mapper, Combiner, and Partitioner in MapReduce?

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When the reducers are are started in a mapreduce job?

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what are the three modes in which Hadoop can be run?

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Write a Mapreduce Program for Character Count ?

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What is the function of mapreducer partitioner?

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