What is the default replication factor?
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what are Task Tracker and Job Tracker?
How hdfa differs with nfs?
What are the Basics of Hadoop?
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
What are the stable versions of Hadoop?
Which is the best hadoop certification?
Explain how can we change the split size if our commodity hardware has less storage space?
What is MapFile?
Command to format the NameNode?
How many instances of a jobtracker run on hadoop cluster?
when hadoop enter in safe mode?
What does ‘jps’ command do?
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