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What is job tracker in Hadoop?


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More Hadoop General Interview Questions

How analysis of Big Data is useful for organizations?

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Give me an example of document database ?

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Suppose hadoop spawned 100 tasks for a job and one of the tasks failed. What will hadoop do?

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Explain how do you overwrite replication factor?

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What type of data we should put in distributed cache? When to put the data in dc? How much volume we should put in?

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Mention what is distributed cache in hadoop?

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Why do we need Hadoop?

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Mention what is data cleansing?

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What is the role of the namenode?

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How is security achieved in Hadoop?

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Web-ui shows that half of the datanodes are in decommissioning mode. What does that mean? Is it safe to remove those nodes from the network?

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Who are ‘Data Scientists’?

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