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What is identity mapper and identity reducer?


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More MapReduce Interview Questions

How to optimize MapReduce Job?

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What is the role of recordreader in hadoop mapreduce?

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

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What can be optimum value for Reducer?

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Explain the general mapreduce algorithm

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How does Mappers run method works?

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What are the key differences between Pig vs MapReduce?

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What do you understand by mapreduce?

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How data is spilt in Hadoop?

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how Hadoop is different from other data processing tools?

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what is NameNode in Hadoop?

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how indexing in HDFS is done?

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