Can you define udf?
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What is single node cluster in Hadoop? for what all purposes Hadoop run on a single node cluster?
How many daemon processes run on a hadoop cluster?
Clarify what a task tracker is in hadoop?
What are the different modes in which we can configure/install Hadoop?
Explain the core methods of the reducer?
If DataNode increases, then do we need to upgrade NameNode?
Explain how jobtracker schedules a task?
What is Distributed Cache in Hadoop?
What webdav is in hadoop?
What is the non dfs used?
What are configuration files in Hadoop?
What type of data we should put in distributed cache? When to put the data in dc? How much volume we should put in?
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