How is HDFS fault tolerant?
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What is inputformat in hadoop?
what are the nodes in the Hadoop cluster?
Who is a 'user' in HDFS?
Did you ever built a production process in hadoop ? If yes then what was the process when your hadoop job fails due to any reason?
What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?
What is Hadoop?
What are active and passive "NameNodes"?
What is structured data?
On what basis data will be stored on a rack?
Should we use RAID in Hadoop or not?
Is secondary namenode a substitute to the namenode?
What are channel selectors?
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