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What is a IdentityMapper and IdentityReducer in MapReduce ?


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More MapReduce Interview Questions

What is Combiner in MapReduce?

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Developing a MapReduce Application?

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what is storage and compute nodes?

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What do you know about nlineinputformat?

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when do reducers play their role in a mapreduce task?

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What is the process of changing the split size if there is limited storage space on Commodity Hardware?

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What is Counter in MapReduce?

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What is the core of the job in MapReduce framework?

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How can we control particular key should go in a specific reducer?

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A number of combiners can be changed or not in MapReduce?

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Why Mapper runs in heavy weight process and not in a thread in MapReduce?

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Why do we need MapReduce during Pig programming?

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