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What is a namenode?


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More Hadoop General Interview Questions

Explain Data Locality in Hadoop?

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How often DataNode send heartbeat to NameNode in Hadoop?

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What does secondary name-node means?

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What is the purpose of context object?

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What do you understand by standalone (or local) mode?

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What is job tracker role in hadoop?

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How job tracker schedules an assignment?

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

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Is nosql follow relational db model?

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Name the files which are used by the startup and shutdown commands?

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What is Mapper? How can we compress Mapper output in Hadoop?

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How often do you need to reformat the namenode?

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