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How does NameNode tackle DataNode failures?


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More Apache Hadoop Interview Questions

Did you ever built a production process in hadoop ? If yes then what was the process when your hadoop job fails due to any reason?

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What are the functionalities of jobtracker?

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Which files are used by the startup and shutdown commands?

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What is the relation between job and task in hadoop?

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What is salary of hadoop developer?

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What is a speculative execution in Apache Hadoop MapReduce?

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What is yarn in hadoop?

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What is HDFS ? How it is different from traditional file systems?

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Does this lead to security issues?

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What is a JobTracker in Hadoop? How many instances of JobTracker run on a Hadoop Cluster?

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Explain the difference between gen1 and gen2 hadoop with regards to the namenode?

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What is Row Key?

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