What is HDFS block size and what did you chose in your project?


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More Apache Hadoop Interview Questions

How to configure hadoop to reuse JVM for mappers?

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Explain InputFormat?

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Are Namenode and job tracker on the same host?

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How will format the HDFS ?

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What are combiners and its purpose?

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Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?

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What is the communication channel between client and namenode/datanode?

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What is speculative execution in Hadoop?

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What is crontab? Explain with suitable example?

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What is the functionality of jobtracker in hadoop?

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What happens in a textinputformat?

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Explain the difference between NameNode

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