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What is Apache Hadoop? Why is Hadoop essential for every Big Data application?


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More Apache Hadoop Interview Questions

What is version-id mismatch error in hadoop?

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Is hadoop open source?

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How many instances of tasktracker run on a hadoop cluster?

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Explain a simple Map/Reduce problem.

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Define a metadata?

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Is hadoop a database?

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What do shuffling do?

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what are the nodes in the Hadoop cluster?

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How does NameNode tackle DataNode failures?

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What Mapper does?

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What is the purpose of RawComparator interface?

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Can we do online transactions(oltp) using hadoop?

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