Clarify what combiners are and when you should utilize a combiner in a map reduce job?


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More MapReduce Interview Questions

What are ‘reduces’?

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What combiners is and when you should use a combiner in a MapReduce Job?

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How to set the number of reducers?

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What can be optimum value for Reducer?

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What is the function of mapreducer partitioner?

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what is NameNode in Hadoop?

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How is Spark not quite the same as MapReduce? Is Spark quicker than MapReduce?

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Why comparison of types is important for MapReduce?

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

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What happens when a datanode fails ?

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mapper or reducer?

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In MapReduce how to change the name of the output file from part-r-00000?

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