What is the difference between SQL and NoSQL?
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In which location Name Node stores its Metadata and why?
what is a datanode?
What happens to a namenode, when job tracker is down?
Is hadoop the future?
What hadoop does in safe mode?
How the HDFS Blocks are replicated?
What is the InputFormat ?
What is nlineoutputformat?
Can Hadoop be compared to NOSQL database like Cassandra?
Explain the difference between NameNode
What are different types of filesystem?
What does the command mapred.job.tracker do?
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