What is namenode?
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If DataNode increases, then do we need to upgrade NameNode?
Tell me some major benefits of Hadoop?
What is LazyOutputFormat in Hadoop?
What is data cleansing?
Explain about Hadoop file system and processing framework?
How to specify more than one path for storage in Hadoop?
What is a Heartbeat in Hadoop?
Which are the three modes in which hadoop can be run?
How can you set an arbitrary number of Reducers to be created for a job in Hadoop?
Can you explain sequence file in hadoop?
What are the features of Pseudo mode?
Explain small file problem in hadoop
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