What is the functionality of jobtracker in hadoop?
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Define a daemon?
What is zookeeper in hadoop?
What is output format in hadoop?
What are sink processors?
What is the communication channel between client and namenode/datanode?
How to exit the vi editor?
How to come out of the insert mode?
How to resolve IOException: Cannot create directory
Explain a simple Map/Reduce problem.
How to restart Namenode?
Input Split & Record Reader and what they do?
What is a namenode? How many instances of namenode run on a hadoop cluster?