Explain how can we check whether namenode is working or not?
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What is the difference between TextInputFormat and KeyValueInputFormat class?
What are the core components of Hadoop?
We have already sql then why nosql?
Can we create a hadoop cluster from scratch?
What is the command to change the replication factor ?
How do you overwrite replication factor?
What is Slot in Hadoop v1? Why was it removed from Hadoop v2?
Why we use intwritable instead of int? Why we use longwritable instead of long?
How is the splitting of file invoked in Hadoop framework?
What happen if a datanode loses network connection for a few minutes?
Mention what are the most common input formats defined in hadoop?
What is hadoop? Name the main components of a hadoop application?
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