What is formatting of the dfs?


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More Apache Hadoop Interview Questions

Which command is used for the retrieval of the status of daemons running the hadoop cluster?

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What are the problems with Hadoop 1.0?

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Explain the shuffle?

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What is IdentityMapper?

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Where is the Mapper Output stored?

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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 a Secondary Namenode? Is it a substitute to the Namenode?

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What are the four characteristics of Big Data?

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What are the limitations of importing RDBMS tables into Hcatalog directly?

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Explain what if rack 2 and datanode fails?

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Mention what is the use of Context Object?

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What is a Task instance in Hadoop? Where does it run?1

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