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What is an identity mapper and identity reducer?


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More MapReduce Interview Questions

Why do we need MapReduce during Pig programming?

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Explain the differences between a combiner and reducer

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What is the function of mapreducer partitioner?

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Explain what is the function of mapreduce partitioner?

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What do you understand by mapreduce?

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what is Speculative Execution?

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What is the next step after Mapper or MapTask?

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Why comparison of types is important for MapReduce?

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What platform and Java version is required to run Hadoop?

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Is it important for Hadoop MapReduce jobs to be written in Java?

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What is the role of recordreader in hadoop mapreduce?

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Is it possible to split 100 lines of input as a single split in MapReduce?

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