What are combiners and its purpose?


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More Apache Hadoop Interview Questions

what factors the block size takes before creation?

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Is fs.mapr.working.dir a single directory?

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What is Apache Hadoop?

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On what basis Namenode will decide which datanode to write on?

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How we can change Replication factor when Data is on the fly?

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Define a metadata?

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What is the difference between traditional RDBMS and Hadoop?

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Mention what is the use of Context Object?

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Can we do online transactions(oltp) using hadoop?

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What is the purpose of RawComparator interface?

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What does /etc /init.d do?

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What do you know about keyvaluetextinputformat?

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