Explain how can we check whether namenode is working or not?
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What are the different modes in which we can configure/install Hadoop?
What happen on the namenode when a client tries to read a data file?
What are the Hadoop features extended to its eco-system components ?
Explain edge nodes in hadoop?
What is a rack?
How to create the directory when name node is in safe mode?
What is Disk Balancer in Hadoop?
What are the network requirements for hadoop?
How jobtracker assign tasks to the tasktracker?
What is JPS? Why is it used in Hadoop?
When and how to create hadoop archive?
If DataNode increases, then do we need to upgrade NameNode in Hadoop?
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