In which directory hadoop is installed?
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What mode(s) can hadoop code be run in?
Explain small file problem in hadoop
List out some common problems faced by data analyst?
Hadoop achieves parallelism by dividing the tasks across many nodes, it is possible for a few slow nodes to rate-limit the rest of the program and slow down the program. What mechanism Hadoop provides to combat this?
What is NameNode? How NameNode tackle Datanode failures in Hadoop?
What is Federation?
What is the best practice to deploy the secondary name node?
Why do we need hadoop for big data analytics?
Can you explain the common input formats in hadoop?
What do you mean by the NameNode High Availability in hadoop?
What are input format, input split & record reader and what they do?
List some use cases where classification machine learning algorithms can be used.
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