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what is a datanode?


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More Apache Hadoop Interview Questions

What is Rack Awareness in Apache Hadoop?

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What is high availability in hadoop?

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

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Explain the master class and the output class do?

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Data Engineer Given a list of followers in the format:123, 345234, 678345, 123…Where column one is the ID of the follower and column two is the ID of the followee. Find all mutual following pairs (the pair 123, 345 in the example above). How would you use Map/Reduce to solve the problem when the list does not fit in memory?

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What is crontab? Explain with suitable example?

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