How many datanodes can run on a single Hadoop cluster?
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How to do ‘map’ and ‘reduce’ works?
Explain what is hadoop?
Clarify what a task tracker is in hadoop?
What is NameNode? How NameNode tackle Datanode failures in Hadoop?
What is streaming access?
Comparison between Secondary NameNode and Checkpoint Node in Hadoop?
How can native libraries be included in yarn jobs?
What are the common types of NOSQL data bases ?
Can you explain indexing?
Explain Hadoop Archives?
Why we use intwritable instead of int? Why we use longwritable instead of long?
What is data cleansing?
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