What are the primary phases of a Reducer?


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More MapReduce Interview Questions

How is mapreduce related to cloud computing?

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What is the relation between MapReduce and Hive?

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How to submit extra files(jars,static files) for MapReduce job during runtime in Hadoop?

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Define speculative execution?

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What is the utility of using Writable Comparable Custom Class in Map Reduce code?

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How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?

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how Hadoop is different from other data processing tools?

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What does a split do?

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what job does the conf class do?

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Explain what combiners are 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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Why is Apache Spark faster than Hadoop MapReduce?

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