What is the role of recordreader in hadoop mapreduce?


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More MapReduce Interview Questions

How to set the number of mappers to be created in MapReduce?

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Explain the input type/format in mapreduce by default?

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Difference between mapreduce and spark

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Explain JobConf in MapReduce.

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What is the data storage component used by Hadoop?

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How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?

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Is it necessary to write a mapreduce job in java?

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In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?

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Is it possible to search for files using wildcards?

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What is a Distributed Cache in Hadoop?

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What is partitioner and its usage?

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What is a map side join?

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