Explain about the partitioning, shuffle and sort phase


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More MapReduce Interview Questions

how indexing in HDFS is done?

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What is an identity mapper and identity reducer?

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In Map Reduce why map write output to Local Disk instead of HDFS?

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What is the data storage component used by Hadoop?

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In MapReduce, ideally how many mappers should be configured on a slave?

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What are the data components used by Hadoop?

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

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Compare RDBMS with Hadoop MapReduce.

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Can there be no Reducer?

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Why Mapper runs in heavy weight process and not in a thread in MapReduce?

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

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Which are the methods in the mapper interface?

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