How often DataNode send heartbeat to NameNode in Hadoop?
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Clarify what a task tracker is in hadoop?
How can one check whether NameNode is working or not?
Where are hadoop’s configuration files located and list them?
Explain edge nodes in hadoop?
Name the operating system(s) which are supported for production hadoop deployment?
What webdav is in hadoop?
What happens in text format?
What is the role of the secondary namenode?
What is check pointing in hadoop?
What is fsck?
How does job tracker schedule a job for the task tracker?
What do you understand by unit and ()in scala?
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