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What is a Record Reader in hadoop?


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More Apache Hadoop Interview Questions

What are the functions of NameNode?

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Define a daemon?

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What is a checkpoint?

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How can we check whether namenode is working or not?

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How can you overwrite the replication factors in HDFS?

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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 if rack 2 and datanode fails?

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

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What is the default block size in hdfs?

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Is it necessary to write jobs for hadoop in the java language?

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Where is the Mapper Output stored?

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How can I install Cloudera VM in my system?

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