What is the difference between SQL and NoSQL?
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What hadoop does in safe mode?
Does this lead to security issues?
Explain what is sqoop in Hadoop ?
How many instances of JobTracker can run on a Hadoop Cluser?
Command to format the NameNode?
What is the default block size in hdfs?
Where is the Mapper Output stored?
Input Split & Record Reader and what they do?
What are the network requirements for using hadoop?
What is structured data?
What alternate way does HDFS provides to recover data in case a Namenode
What is the process to change the files at arbitrary locations in HDFS?
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