How to Administering Hadoop?
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How can we check whether namenode is working or not?
Is it necessary to write jobs for hadoop in the java language?
what is the default replication factor in HDFS?
How will you make changes to the default configuration files?
Is hadoop obsolete?
What should be the ideal replication factor in Hadoop Cluster?
On what basis Namenode will decide which datanode to write on?
What is difference between split and block in hadoop?
What is commodity hardware?
Can you explain how do ‘map’ and ‘reduce’ work?
What is formatting of the dfs?
What is Rack Awareness in Apache Hadoop?