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Why do we need Hadoop?


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More Hadoop General Interview Questions

Why is Data Block size set to 128 MB in Hadoop?

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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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What is the default replication factor in Hadoop and how will you change it?

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Mention what are the three modes in which hadoop can be run?

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What is namenode?

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Name the most common input formats defined in hadoop?

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What is Mapper in Hadoop?

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How do you overwrite replication factor?

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What is difference between reducer and combiner?

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What are the Features of Hadoop?

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What is Combiner in Hadoop?

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How namenode handles data node failures?

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