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Explain the difference between gen1 and gen2 hadoop with regards to the namenode?


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More Apache Hadoop Interview Questions

What do you know by storage and compute node?

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What is speculative execution in Hadoop?

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On which port does ssh work?

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Is hadoop required for data science?

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Explain the use of tasktracker in the hadoop cluster?

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Can you explain how do ‘map’ and ‘reduce’ work?

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What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?

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Is a job split into maps?

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What is Apache Hadoop? Why is Hadoop essential for every Big Data application?

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Rack awareness of Namenode?

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How many JVMs run on a slave node?

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What are the functions of NameNode?

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