what is SPF?
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What is Derby database?
What is formatting of the dfs?
What is a heartbeat in HDFS?
Rack awareness of Namenode?
What do you know about nlineoutputformat?
Is hadoop a database?
How will format the HDFS ?
What is a Record Reader in hadoop?
What are combiners and its purpose?
Who invented hadoop?
Is it necessary to know java to learn hadoop?
Define a namenode?
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