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Define data cleansing?


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More Hadoop General Interview Questions

What is heartbeat in hadoop?

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what happens when namenode goes down during file read operation in hadoop?

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What are input format, input split & record reader and what they do?

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What are some typical functions of Job Tracker?

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Explain what is jobtracker in hadoop? What are the actions followed by hadoop?

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Ideally what should be replication factor in a Hadoop cluster?

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Where are hadoop’s configuration files located and list them?

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Give examples of some companies that are using Hadoop structure?

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What are the features of Fully-Distributed mode?

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Explain what is speculative execution?

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What are the main components of hadoop?

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What does the high availability of a name-node means?

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