Define the Use of MapReduce?

666

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Whether the output of mapper or output of partitioner written on local disk?

672

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

699

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Explain the process of spilling in MapReduce?

597

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What is LazyOutputFormat in MapReduce?

684

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What is Output Format in MapReduce?

695

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Explain the features of Apache Spark because of which it is superior to Apache MapReduce?

618

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What are the identity mapper and reducer in MapReduce?

781

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How to optimize Hadoop MapReduce Job?

632

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How to specify more than one directory as input in the Hadoop MapReduce Program?

714

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How to change the name of the output file from part-r-00000 in Hadoop MapReduce?

652

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Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?

615

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In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?

645

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How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?

625

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What is the relation between MapReduce and Hive?

643

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