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What is Chain Mapper?


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More Hadoop General Interview Questions

What do you mean by the NameNode High Availability in hadoop?

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Mention what is data cleansing?

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Why use hadoop?

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What is NameNode? How NameNode tackle Datanode failures in Hadoop?

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What does the mapred.job.tracker command do?

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What are the port numbers of task tracker?

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

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Mention what is distributed cache in hadoop?

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What is Chain Mapper?

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What happen if number of reducer is set to 0 in Hadoop?

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What happens if you get a ‘connection refused java exception’ when you type hadoop fsck /?

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What do you know about the speculative execution?

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