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How namenode handles data node failures?


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More Hadoop General Interview Questions

What is distributed copy (distcp)?

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How to restart NameNode or all the daemons in Hadoop?

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Did you ever ran into a lop sided job that resulted in out of memory error, if yes then how did you handled it ?

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Why aggregation cannot be done in Mapper?

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How does job tracker schedule a job for the task tracker?

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Is it possible to have hadoop job output in multiple directories? If yes, how?

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What are the side effects of not running a secondary name node?

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What is 'jps'?

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What is fsck?

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what is next step after mapper or maptask?

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What mode(s) can hadoop code be run in?

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What is Rack Awareness? What is its need in Hadoop?

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