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What is Combiner in MapReduce?


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More MapReduce Interview Questions

Explain what is the function of mapreduce partitioner?

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How to specify more than one directory as input in the Hadoop MapReduce Program?

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What comes in Hadoop 2.0 and MapReduce V2 YARN

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How to change the name of the output file from part-r-00000 in Hadoop MapReduce?

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Explain slot in Hadoop Map-Reduce v1?

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What is shuffling and sorting in mapreduce?

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When should you use a reducer?

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What main configuration parameters are specified in mapreduce?

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Explain JobConf in MapReduce.

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Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?

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What is the key- value pair in Hadoop MapReduce?

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Explain job scheduling through JobTracker

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