How the Client communicates with HDFS?


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More Apache Hadoop Interview Questions

How client application interacts with the NameNode?

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What is IdentityMapper?

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What is a Record Reader in hadoop?

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How is hadoop different from other data processing tools?

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What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

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Explain the master class and the output class do?

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What are the important differences between apache and hadoop?

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How many instances of tasktracker run on a hadoop cluster?

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What is Derby database?

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What is the InputFormat ?

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Define a metadata?

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Explain the use of tasktracker in the hadoop cluster?

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