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What is a checkpoint?


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More Apache Hadoop Interview Questions

Where do you specify the Mapper Implementation?

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In which location Name Node stores its Metadata and why?

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What is NoSQL?

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Define a namenode?

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

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What does /var/hadoop/pids do?

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Define fault tolerance?

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Define a task tracker?

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What exactly is hadoop?

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What is the meaning of speculative execution in Hadoop? Why is it important?

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What should be the ideal replication factor in Hadoop Cluster?

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Hadoop Libraries and Utilities and Miscellaneous Hadoop Applications?

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