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What are the four essential parameters of a mapper?


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More MapReduce Interview Questions

How do reducers communicate with each other?

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Can we rename the output file?

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

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What is optimal size of a file for distributed cache?

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What are the fundamental configurations parameters specified in map reduce?

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What is the relation between MapReduce and Hive?

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When should you use a reducer?

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Explain the input type/format in mapreduce by default?

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What is reduce side join in mapreduce?

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What is OutputCommitter?

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What does a split do?

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How can we assure that the values regarding a particular key goes to the same reducer?

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