Why Hadoop performs replication, although it results in data redundancy?
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Mention what does the text input format do?
What is NameNode? How NameNode tackle Datanode failures in Hadoop?
What are the important modes of hadoop?
What are the major differences between Hadoop 2 and Hadoop 3?
If datanodes increase, then do we need to upgrade namenode?
What are the limitations of Hadoop?
What daemons run on master nodes?
Explain the core methods of the reducer?
What happens in text format?
Is it possible to have hadoop job output in multiple directories?
What is Distributed Cache in Hadoop?
What is the difference between an inputsplit and a block?
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