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Can you define udf?


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More Hadoop General Interview Questions

What is single node cluster in Hadoop? for what all purposes Hadoop run on a single node cluster?

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How many daemon processes run on a hadoop cluster?

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Clarify what a task tracker is in hadoop?

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What are the different modes in which we can configure/install Hadoop?

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Explain the core methods of the reducer?

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If DataNode increases, then do we need to upgrade NameNode?

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Explain how jobtracker schedules a task?

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What is Distributed Cache in Hadoop?

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What webdav is in hadoop?

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What is the non dfs used?

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What are configuration files in Hadoop?

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What type of data we should put in distributed cache? When to put the data in dc? How much volume we should put in?

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