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Explain about the basic parameters of mapper and reducer function


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More MapReduce Interview Questions

what is distributed cache in mapreduce framework?

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When should you use a reducer?

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Define Writable data types in Hadoop MapReduce?

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How to set which framework would be used to run mapreduce program?

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What is Mapper in Hadoop MapReduce?

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Why comparison of types is important for MapReduce?

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What is an input reader in reference to mapreduce?

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Mention what are the main configuration parameters that user need to specify to run mapreduce job?

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What is a RecordReader in Hadoop MapReduce?

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

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What are the identity mapper and reducer in MapReduce?

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Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?

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