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What is namenode?


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More Hadoop General Interview Questions

What is the role of the secondary namenode?

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What are the Hadoop features extended to its eco-system components ?

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List out some common problems faced by data analyst?

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Why does one remove or add nodes in a Hadoop cluster frequently?

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Do we require two servers for the namenode and the datanodes?

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When and how to create hadoop archive?

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What is purpose of RecordWriter in Hadoop?

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What is heartbeat in hadoop?

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Why we use intwritable instead of int? Why we use longwritable instead of long?

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How can native libraries be included in yarn jobs?

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Why cloudera is used?

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

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