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what are the nodes in the Hadoop cluster?


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More Apache Hadoop Interview Questions

What happens to a NameNode that has no data?

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What is nlineoutputformat?

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Is it necessary to know java to learn hadoop?

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What is a Combiner?

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What do the master class and the output class do?

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

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Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?

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What is rack-aware replica placement policy?

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

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Define a job tracker?

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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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Define streaming access?

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