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How to create a custom key and custom value in MapReduce Job?


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More MapReduce Interview Questions

how can you debug Hadoop code?

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Define the purpose of the partition function in mapreduce framework

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What is the input type/format in MapReduce by default?

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What is heartbeat in hdfs? Explain.

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Mention what are the main configuration parameters that user need to specify to run mapreduce job?

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What are the key differences between Pig vs MapReduce?

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How does fault tolerance work in mapreduce?

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What is the difference between Job and Task in MapReduce?

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What does conf.setmapper class do?

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what happens when Hadoop spawned 50 tasks for a job and one of the task failed?

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What is the next step after Mapper or MapTask?

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What do you mean by data locality?

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