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What is partitioner and its usage?


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More MapReduce Interview Questions

List the network requirements for using Hadoop ?

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

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Is YARN a replacement of Hadoop MapReduce?

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

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What counter in Hadoop MapReduce?

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Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?

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How to handle record boundaries in Text files or Sequence files in MapReduce InputSplits?

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How to overwrite an existing output file during execution of mapreduce jobs?

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Mention when to use Map reduce mode?

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Why MapReduce uses the key-value pair to process the data?

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Explain how mapreduce works.

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How to set mappers and reducers for Hadoop jobs?

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