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What is the meaning of speculative execution in Hadoop? Why is it important?


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More Apache Hadoop Interview Questions

What happens in a textinputformat?

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What is partioner in hadoop? Where does it run,mapper or reducer?

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What is Writable & WritableComparable interface?

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How does NameNode tackle DataNode failures?

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How to use Apache Zookeeper command line interface?

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What is hbase in hadoop?

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How is the option in Hadoop to skip the bad records?

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What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?

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Explain how input and output data format of the hadoop framework?

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Explain a simple Map/Reduce problem.

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What is the difference between hadoop and other data processing tools?

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

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