Define the Use of MapReduce?

729

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

726

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

740

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Explain the process of spilling in MapReduce?

658

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List Hadoop’s three configuration files?

464

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What is Distributed Cache in Hadoop?

514

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What is the relationship between Jobs and Tasks in Hadoop?

666

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Who are ‘Data Scientists’?

469

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Tell me some major benefits of Hadoop?

462

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What is structured and unstructured data?

509

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According to IBM, what are the three characteristics of Big Data?

480

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Which port does SSH work on?

446

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Is there another way to check whether Namenode is working?

467

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What is the NameNode port number?

441

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Give me an example of document database ?

539

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