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When should you use a reducer?


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More MapReduce Interview Questions

What are the benefits of Spark over MapReduce?

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Differentiate Reducer and Combiner in Hadoop MapReduce?

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Why is output file name in Hadoop MapReduce part-r-00000?

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When is it suggested to use a combiner in a MapReduce job?

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How to compress mapper output in Hadoop?

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What is a distributed cache in mapreduce framework?

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Define the Use of MapReduce?

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List the configuration parameters that have to be specified when running a MapReduce job.

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Difference between mapreduce and spark

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What are the various configuration parameters required to run a mapreduce job?

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What is a scarce system resource?

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What do you mean by inputformat?

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