How did you debug your Hadoop code ?
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explain Metadata in Namenode?
Does this lead to security issues?
Explain the difference between gen1 and gen2 hadoop with regards to the namenode?
Is hadoop open source?
What is the Use of SSH in Hadoop ?
What are the default configuration files that are used in hadoop?
What is unstructured data?
What is a Record Reader in hadoop?
Why do we need a password-less ssh in fully distributed environment?
How is the option in Hadoop to skip the bad records?
what are the nodes in the Hadoop cluster?
What is oozie in hadoop?
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