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What is heartbeat in hadoop?
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Is it possible to provide multiple input to Hadoop? If yes then how can you give multiple directories as input to the Hadoop job?
If DataNode increases, then do we need to upgrade NameNode?
Can you explain record reader?
What is the command to change the replication factor ?
What is rack awareness in hadoop?
Why can we not create directory /user/dataflair/inpdata001 when name node is in safe mode?
What is the difference between TextinputFormat and KeyValueTextInputFormat class?
Can you explain edge nodes in hadoop?
What are some of the characteristics of Hadoop framework?
What is the role of the namenode?
What is the difference between an inputsplit and a block?
How does hadoop achieve fault tolerance?
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