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What is the core of the job in MapReduce framework?


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More MapReduce Interview Questions

What is LazyOutputFormat in MapReduce?

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In mapreduce what is a scarce system resource? Explain?

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What is the default input type in MapReduce?

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Explain what does the conf.setMapper Class do in MapReduce?

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Explain the general mapreduce algorithm

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MapReduce Types and Formats and Setting up a Hadoop Cluster?

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

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Explain the Reducer's Sort phase?

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What is the next step after Mapper or MapTask?

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What is identity mapper and reducer? In which cases can we use them?

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What are the various configuration parameters required to run a mapreduce job?

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Explain what is “map” and what is "reducer" in hadoop?

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