Explain the difference between NameNode


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What are the network requirements for using hadoop?

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Is client the end user in HDFS?

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Explain how is hadoop different from other data processing tools?

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What is Row Key?

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What will be the consideration while we do Hardware Planning for Master in Hadoop architecture?

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What is Writable & WritableComparable interface?

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Which are the two types of 'writes' in HDFS?

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Can we call vms as pseudos?

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Explain the master class and the output class do?

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What is configuration of a typical slave node on Hadoop cluster? How many JVMs run on a slave node?

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What is the purpose of button groups?

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What is the purpose of dfsadmin tool?

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