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How can we check whether namenode is working or not?


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More Apache Hadoop Interview Questions

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

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What does ‘jps’ command do?

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What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?

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What is formatting of the dfs?

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What is rack-aware replica placement policy?

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What is your favourite tool in the hadoop ecosystem?

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what is SPF?

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Explain the difference between NameNode

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

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What is yarn in hadoop?

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