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What is a "reducer" in Hadoop?


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More MapReduce Interview Questions

Is it possible to search for files using wildcards?

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What are the identity mapper and reducer in MapReduce?

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When Namenode is down what happens to job tracker?

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How does fault tolerance work in mapreduce?

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Which among the two is preferable for the project- Hadoop MapReduce or Apache Spark?

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Explain what are the basic parameters of a mapper?

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What is MapReduce in Hadoop?

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What is a Distributed Cache in Hadoop?

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Detail description of the Reducer phases?

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What is Hadoop Map Reduce ?

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what does the conf.setMapper Class do ?

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What is the best way to copy files between HDFS clusters?

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