What will you do when NameNode is down?


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More Apache Hadoop Interview Questions

Mention what is the use of Context Object?

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In which location Name Node stores its Metadata and why?

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What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?

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What is Schema on Read and Schema on Write?

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What is HDFS block size and what did you chose in your project?

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Why is hadoop faster?

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How many instances of a jobtracker run on hadoop cluster?

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What is Hadoop serialization?

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What are the core components of Apache Hadoop?

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how can we change Replication Factor?

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Command to format the NameNode?

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What is output format in hadoop?

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