Define a namenode?
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What is the relation between job and task in hadoop?
What stored in HDFS?
How does NameNode tackle DataNode failures?
What are sink processors?
What is a Record Reader in hadoop?
What is the function of ApplicationMaster?
How will format the HDFS ?
What are the main components of a Hadoop Application?
How many instances of tasktracker run on a hadoop cluster?
Is it necessary to write jobs for hadoop in the java language?
How is the distance between two nodes defined in Hadoop?
What are the network requirements for using hadoop?