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Differentiate Reducer and Combiner in Hadoop MapReduce?


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More MapReduce Interview Questions

what are the most common input formats defined in Hadoop?

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What are the main components of MapReduce Job?

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

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

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

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What is the problem with the small file in Hadoop?

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what is the Hadoop MapReduce APIs contract for a key and value class?

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In Hadoop, which file controls reporting in Hadoop?

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What is a partitioner and how the user can control which key will go to which reducer?

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How does fault tolerance work in mapreduce?

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

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What is a mapreduce algorithm?

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