What do shuffling do?


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More Apache Hadoop Interview Questions

What is a Secondary Namenode? Is it a substitute to the Namenode?

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What is Schema on Read and Schema on Write?

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What is zookeeper in hadoop?

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What is the jobtracker?

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what should be the ideal replication factor in hadoop?

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How is security achieved in Apache Hadoop?

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What is the functionality of jobtracker in hadoop?

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What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

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Define a metadata?

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Define streaming?

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How we can change Replication factor when Data is on the fly?

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Explain the hadoop-core configuration?

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