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What is a speculative execution in Apache Hadoop MapReduce?


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More Apache Hadoop Interview Questions

What mechanism does hadoop framework provides to synchronize changes made in distribution cache during runtime of the application?

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Mention what are the data components used by Hadoop?

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What is IdentityMapper?

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Mention what is the number of default partitioner in Hadoop?

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How does NameNode tackle DataNode failures?

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What happens to a namenode, when job tracker is down?

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If a data Node is full how it's identified?

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Explain the features of stand alone (local) mode?

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Define a daemon?

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Explain the core components of hadoop?

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How is the distance between two nodes defined in Hadoop?

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Define a metadata?

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