What are the Basics of Hadoop?
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Explain how can we change the split size if our commodity hardware has less storage space?
How does master slave architecture in the hadoop?
What are the port numbers of namenode, job tracker and task tracker?
How will format the HDFS ?
Does Hadoop requires RAID?
What is the heartbeat used for?
How to enable trash/recycle bin in hadoop?
Why do we need a password-less ssh in fully distributed environment?
What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?
What is Derby database?
How many Daemon processes run on a Hadoop system?
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
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