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What is the purpose of DataNode block scanner?


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More Apache Hadoop Interview Questions

What is MapFile?

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How many instances of tasktracker run on a hadoop cluster?

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What is 'Key value pair' in HDFS?

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How can we check whether namenode is working or not?

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How can we look for the namenode in the browser?

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

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What alternate way does HDFS provides to recover data in case a Namenode

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Explain what if rack 2 and datanode fails?

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Explain what is sqoop in Hadoop ?

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