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What happen when namenode enters in safemode in hadoop?


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More Hadoop General Interview Questions

What are the port numbers of job tracker?

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What is distributed copy (distcp)?

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List some use cases where classification machine learning algorithms can be 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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What is Distributed Cache in Hadoop?

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Can you explain the common input formats in hadoop?

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What is the number of default partitioner in hadoop?

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Can you define inputsplit in hadoop?

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Is it possible to have hadoop job output in multiple directories? If yes, how?

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Clarify what is sqoop in hadoop?

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How NameNode tackle Datanode failures in Hadoop?

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What is the difference between namenode and datanode in hadoop?

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