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What is active and passive NameNode in Hadoop?


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More Hadoop General Interview Questions

What are the tools used in big data?

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Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?

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What is JobTracker?

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What is the NameNode port number?

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Is it possible to rename the output file, and if so, how?

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Mention what is data cleansing?

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What are the port numbers of job tracker?

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What are the features of Standalone (local) mode?

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Where are Hadoop’s configuration files located?

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What is High Availability feature in Hadoop2?

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Mention what are the three modes in which hadoop can be run?

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Give me examples of unstructured data?

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