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Define a udf?


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More Hadoop General Interview Questions

Clarify what webdav is in hadoop?

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Mention what is distributed cache in hadoop?

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How job tracker schedules an assignment?

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How can you native libraries be included in yarn jobs?

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What are the core components of Hadoop?

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What are the four basic parameters of a mapper?

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What is High Availability feature in Hadoop2?

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Is Namenode machine same as DataNode machine as in terms of hardware in Hadoop?

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What are some typical functions of job tracker in hadoop?

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What happens when two clients try to access the same file in the hdfs?

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What are some of the characteristics of Hadoop framework?

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Are there any special requirements for namenode?

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