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What is data cleansing?


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More Hadoop General Interview Questions

What happen if number of reducer is set to 0 in Hadoop?

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How can we create a hadoop cluster from scratch?

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What happens if one hadoop client renames a file or a directory containing this file while another client is still writing into it?

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Explain what is sequencefileinputformat?

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What is High Availability feature in Hadoop2?

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Clarify how ordering in hdfs is finished?

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What is the key difference between NameNode and DataNode in Hadoop?

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Explain the core methods of the reducer?

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What is fsck?

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What are the four basic parameters of a mapper?

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What is the role of the namenode?

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What are the tools used in big data?

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