What is Disk Balancer in Hadoop?
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Is it possible to have hadoop job output in multiple directories? If yes, how?
What is Federation?
Can we change the file cached by distributed cache
What are the port numbers of task tracker?
In which location name node sores its metadata and why?
Ideally what should be the block size in hadoop?
What happen if a datanode loses network connection for a few minutes?
Explain what is a sequence file in hadoop?
Mention what job does the conf class do?
What is Distributed Cache in Hadoop?
What is the default replication factor and how will you change it?
How to do ‘map’ and ‘reduce’ works?
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