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

527

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

528

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How is the splitting of file invoked in Hadoop framework?

513

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

502

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

452

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

533

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Explain Hadoop Archives?

540

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Explain the Single point of Failure in Hadoop?

477

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Explain Erasure Coding in Hadoop?

508

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What is Disk Balancer in Hadoop?

513

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

420

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

461

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

552

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

481

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

441

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