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Define a udf?


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More Hadoop General Interview Questions

what is next step after mapper or maptask?

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What are configuration files in Hadoop?

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What happen if one of the datanodes has much slower cpu?

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Explain what happens when hadoop spawned 50 tasks for a job and one of the task failed?

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Clarify what webdav is in hadoop?

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What is a record reader?

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Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?

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Doesn’t google have its very own version of dfs?

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What is a Heartbeat in Hadoop?

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What are 'slaves' and 'masters' in Hadoop?

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What is a udf?

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Can you explain bloommapfile.

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