What are the different commands used to startup and shutdown Hadoop daemons?

479

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What is configured in /etc/hosts and what is its role in setting Hadoop cluster?

464

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How is the splitting of file invoked in Hadoop framework?

472

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Is it possible to provide multiple input to Hadoop? If yes then how?

465

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Is it possible to have hadoop job output in multiple directories? If yes, how?

422

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What is the default replication factor and how will you change it?

484

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Explain Hadoop Archives?

487

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Explain the Single point of Failure in Hadoop?

437

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Explain Erasure Coding in Hadoop?

463

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What is Disk Balancer in Hadoop?

453

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How would you check whether your NameNode is working or not?

386

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Is Namenode machine same as DataNode machine as in terms of hardware?

428

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If DataNode increases, then do we need to upgrade NameNode?

515

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What happens if the number of reducers is 0 in Hadoop?

458

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Why is Data Block size set to 128 MB in Hadoop?

410

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