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Explain what is namenode in hadoop?


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More Hadoop General Interview Questions

Who are ‘Data Scientists’?

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What does rack awareness algorithm means and why is it utilized as a part of hadoop?

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Mention what are the most common input formats defined in hadoop?

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Comparison between Secondary NameNode and Checkpoint Node in Hadoop?

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Can you explain textinformat?

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List of the some best tools that can be useful for data-analysis?

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Mention what is the data storage component used by hadoop?

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Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?

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Explain what happens when hadoop spawned 50 tasks for a job and one of the task failed?

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

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What is configured in /etc/hosts and what is its role in setting Hadoop cluster?

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What is a single point of failure in Hadoop 1 and how is it resolved in Hadoop 2?

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