What are the parameters of mappers and reducers?
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What is heartbeat in hadoop?
What is Combiner in Hadoop?
Clarify what a task tracker is in hadoop?
How to debug Hadoop code?
What is active and passive NameNode in Hadoop?
Explain what is a sequence file in hadoop?
Where are Hadoop’s configuration files located?
Why do the nodes are removed and added frequently in a hadoop cluster?
Explain small file problem in hadoop
Is it possible to have hadoop job output in multiple directories? If yes, how?
Why use hadoop?
What is NameNode? How NameNode tackle Datanode failures in Hadoop?
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