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What is a "map" in Hadoop?


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More MapReduce Interview Questions

what are the main configuration parameters that user need to specify to run Mapreduce Job ?

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How does Hadoop Classpath plays a vital role in stopping or starting in Hadoop daemons?

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What is the InputSplit in map reduce ?

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how to proceed to write your first mapreducer program?

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Explain the difference between a MapReduce InputSplit and HDFS block?

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Why can aggregation not be done in Mapper in MapReduce?

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What is the role of a MapReduce partitioner?

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What is the relationship between Job and Task in Hadoop?

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what is WebDAV in Hadoop?

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What is the fundamental difference between a MapReduce InputSplit and HDFS block?

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What is heartbeat in hdfs?

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Mention what is the next step after mapper or maptask?

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