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What is Chain Mapper?


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More Hadoop General Interview Questions

Explain the difference between an inputsplit and a block?

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What is difference between secondary namenode, checkpoint namenode & backupnode?

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Is hadoop still in demand?

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

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what is next step after mapper or maptask?

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Which modes can Hadoop be run in? List a few features for each mode?

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What is a Heartbeat in Hadoop?

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What is the difference between a hadoop database and relational database?

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What are the main components of hadoop?

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Clarify what a task tracker is in hadoop?

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How to specify more than one path for storage in Hadoop?

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How can you set an arbitrary number of Reducers to be created for a job in Hadoop?

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