Explain combiners.


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More MapReduce Interview Questions

What is MapReduce in Hadoop?

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What is shuffling in mapreduce?

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What do you know about nlineinputformat?

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how to proceed to write your first mapreducer program?

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How to set the number of reducers?

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What do you understand by the term Straggler ?

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What is the difference between an RDBMS and Hadoop?

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What is RecordReader in a Map Reduce?

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Is Mapreduce Required For Impala? Will Impala Continue To Work As Expected If Mapreduce Is Stopped?

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what is "map" and what is "reducer" in Hadoop?

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Explain what is shuffling in mapreduce?

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Where is the output of Mapper written in Hadoop?

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