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Define a daemon?


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More Apache Hadoop Interview Questions

Did you ever built a production process in hadoop ? If yes then what was the process when your hadoop job fails due to any reason?

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What is inputformat in hadoop?

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did you maintain the hadoop cluster in-house or used hadoop in the cloud?

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What are the stable versions of Hadoop?

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How does NameNode tackle DataNode failures?

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What is a namenode? How many instances of namenode run on a hadoop cluster?

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What hadoop does in safe mode?

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How will you make changes to the default configuration files?

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Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?

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Why password is needed in ssh localhost?

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What do shuffling do?

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How many instances of a jobtracker run on hadoop cluster?

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