What hadoop does in safe mode?
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How you can contact your client everyday ?
How to change replication factor of files already stored in HDFS?
What if a namenode has no data?
Main Components of Hadoop?
What are sink processors?
What is a Task instance in Hadoop? Where does it run?1
Explain why the name ‘hadoop’?
How many instances of tasktracker run on a hadoop cluster?
How we can take Hadoop out of Safe Mode?
How to resolve ioexception: cannot create directory, while formatting namenode in hadoop?
On what basis Namenode will decide which datanode to write on?
Mention what are the data components used by Hadoop?