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If datanodes increase, then do we need to upgrade namenode?


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More Hadoop General Interview Questions

Explain the core methods of the reducer?

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Mention what is the difference between an rdbms and hadoop?

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Clarify how job tracker schedules an assignment?

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How is the splitting of file invoked in Hadoop framework?

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What happens if you don?t override the mapper methods and keep them as it is?

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What is distributed copy (distcp)?

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How to use combiner in hadoop ?

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If no custom partitioner is defined in Hadoop then how is data partitioned before it is sent to the reducer?

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What jobtracker is in hadoop? What are the activities followed by hadoop?

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How does hadoop achieve fault tolerance?

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What is TextInputFormat in Hadoop?

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What is the best practice to deploy the secondary name node?

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