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


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More Apache Hadoop Interview Questions

What is a checkpoint?

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Is it necessary to write jobs for hadoop in the java language?

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Why do we use Hadoop?

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What are different types of filesystem?

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What is crontab? Explain with suitable example?

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Can Apache Kafka be used without Zookeeper?

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Explain the master class and the output class do?

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Can you explain how do ‘map’ and ‘reduce’ work?

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What are the most commonly defined input formats in Hadoop?

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Explain what if rack 2 and datanode fails?

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Is a job split into maps?

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How would you use Map/Reduce to split a very large graph into smaller pieces and parallelize the computation of edges according to the fast/dynamic change of data?

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