What is the difference between traditional RDBMS and Hadoop?
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What is high availability in hadoop?
In which location Name Node stores its Metadata and why?
What are the basic available commands in Hadoop sqoop ?
How the HDFS Blocks are replicated?
What is Hadoop streaming?
What are the modules that constitute the Apache Hadoop 2.0 framework?
what is the typical block size of an HDFS block?
Rack awareness of Namenode?
What is the sequencefileinputformat in hadoop?
What is the functionality of jobtracker in hadoop?
What is 'Key value pair' in HDFS?
What is a Record Reader in hadoop?