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What are the four basic parameters of a mapper?


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More Hadoop General Interview Questions

Clarify what is sqoop in hadoop?

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Why would nosql be better than using a sql database? And how much better is it?

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How to create the directory when name node is in safe mode?

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What is tasktracker in hadoop?

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Tell me some major benefits of Hadoop?

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Explain the difference between an inputsplit and a block?

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

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After the Map phase finishes, the Hadoop framework does 'Partitioning, Shuffle and sort'. Explain what happens in this phase?

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What does the high availability of a name-node means? How is it accomplished?

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What are some of the characteristics of Hadoop framework?

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Clarify what is sequence file input format?

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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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