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What is rack-aware replica placement policy?


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More Apache Hadoop Interview Questions

What is Schema on Read and Schema on Write?

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On what basis data will be stored on a rack?

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Define a metadata?

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Why is hadoop faster?

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Which command is used for the retrieval of the status of daemons running the hadoop cluster?

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What is the difference between Gen1 and Gen2 Hadoop with regards to the Namenode?

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What are the most commonly defined input formats in Hadoop?

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Is a job split into maps?

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Can you explain how do ‘map’ and ‘reduce’ work?

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What is difference between split and block in hadoop?

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

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