What is IdentityMapper?
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what are Task Tracker and Job Tracker?
What is Your Cluster size ?
What is your favourite tool in the hadoop ecosystem?
What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?
On what basis data will be stored on a rack?
How to write a Custom Key Class?
How can I restart namenode?
How to come out of the insert mode?
Explain a simple Map/Reduce problem.
What are the basic available commands in Hadoop sqoop ?
how can we change Replication Factor?
Explain the hadoop configuration files at present?
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