How is HDFS fault tolerant?


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More Apache Hadoop Interview Questions

Define tasktracker.

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Why are the number of splits equal to the number of maps?

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Explain the use of tasktracker in the hadoop cluster?

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How did you debug your Hadoop code ?

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What is a heartbeat in HDFS?

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Does the hdfs client decide the input split or namenode?

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On which port does ssh work?

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

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Why do we need a password-less ssh in fully distributed environment?

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Why the name ‘hadoop’?

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What are the limitations of importing RDBMS tables into Hcatalog directly?

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Have you ever used Counters in Hadoop. Give us an example scenario?

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