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What is the difference between namenode and datanode in hadoop?


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More Hadoop General Interview Questions

According to IBM, what are the three characteristics of Big Data?

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When and how to create hadoop archive?

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Give me the examples of Columnar database ?

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What is distributed copy (distcp)?

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Where are hadoop’s configuration files located and list them?

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Mention what daemons run on a master node and slave nodes?

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What happens if you don?t override the mapper methods and keep them as it is?

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Compare Hadoop 2 and Hadoop 3?

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What is tasktracker in hadoop?

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What is the use of context object?

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What does rack awareness algorithm means and why is it utilized as a part of hadoop?

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Give me examples of unstructured data?

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