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More Apache Hadoop Interview Questions

What does the command mapred.job.tracker do?

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Can NameNode and DataNode be a commodity hardware?

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How does NameNode tackle DataNode failures?

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What happens to a NameNode that has no data?

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What is Apache Hadoop YARN?

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What is zookeeper in hadoop?

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What is a Combiner?

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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 safe mode in Hadoop?

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Explain the shuffle?

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What is Your Cluster size ?

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What is hbase in hadoop?

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