What is the non dfs used?
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What happens if number of reducers are 0?
What are the Features of Hadoop?
How jobtracker assign tasks to the tasktracker?
What is a Heartbeat in Hadoop?
What is Slot in Hadoop v1? Why was it removed from Hadoop v2?
What is difference between reducer and combiner?
Explain the core methods of the reducer?
What is the characteristic of streaming API that makes it flexible run MapReduce jobs in languages like Perl, Ruby, Awk etc.?
What are the common types of NOSQL data bases ?
What are input format, input split & record reader and what they do?
What is a Backup node in Hadoop?
Define data cleansing?
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