What are the network requirements for using hadoop?
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What is a secondary namenode?
What is a Record Reader in hadoop?
What is small file problem in hadoop?
what is the default replication factor in HDFS?
How to write a Custom Key Class?
Define tasktracker.
Does Hadoop requires RAID?
Explain the overview of hadoop history breifly?
Can we do online transactions(oltp) using hadoop?
Mention what are the data components used by Hadoop?
If a data Node is full how it's identified?
What are the two main components of ResourceManager?
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