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What is Combiner in Hadoop?


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More Hadoop General Interview Questions

What is a rack?

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What is Mapper in Hadoop?

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How can native libraries be included in yarn jobs?

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What is a single point of failure in Hadoop 1 and how is it resolved in Hadoop 2?

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Explain the common input formats in hadoop?

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What are the side effects of not running a secondary name node?

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Explain about Hadoop file system and processing framework?

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Mention how many inputsplits is made by a hadoop framework?

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What are some typical functions of job tracker in hadoop?

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

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Give examples of some companies that are using Hadoop structure?

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What is the job tracker role in hadoop?

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