Why use hadoop?
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How to create a user in Hadoop?
What are the functionalities of jobtracer?
List Hadoop’s three configuration files?
Explain what is namenode in hadoop?
Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?
Can you define udf?
What is the role of the namenode?
Can we deploy job tracker other than name node?
What are the Features of Hadoop?
How often DataNode send heartbeat to NameNode in Hadoop?
What is streaming access?
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?
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