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Which files are used by the startup and shutdown commands?


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More Apache Hadoop Interview Questions

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 keyvaluetextinputformat?

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when hadoop enter in safe mode?

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Why do we use HDFS for applications having large data sets and not when there are lot of small files?

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What is the relation between job and task in hadoop?

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Do we need to give a password, even if the key is added in ssh?

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

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Define streaming access?

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

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Explain the hadoop-core configuration?

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What is the difference between SQL and NoSQL?

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What's the best way to copy files between HDFS clusters?

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