What is the Use of SSH in Hadoop ?
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Explain how do ‘map’ and ‘reduce’ works?
What is Rack awareness?
What Mapper does?
Explain why do we need hadoop?
Does Hadoop requires RAID?
What is structured data?
What is NoSQL?
How does NameNode tackle DataNode failures?
Explain the use of .mecia class?
What do you know by storage and compute node?
Name some companies that use Hadoop?
Explain InputFormat?