Is it possible to rename the output file?
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What is shuffling and sorting in Hadoop MapReduce?
What happens when a datanode fails ?
How to set mappers and reducers for Hadoop jobs?
What main configuration parameters are specified in mapreduce?
when do reducers play their role in a mapreduce task?
What is a Distributed Cache in Hadoop?
Where is the output of Mapper written in Hadoop?
In Map Reduce why map write output to Local Disk instead of HDFS?
When should you use a reducer?
Define Writable data types in MapReduce?
What is MapReduce?
Mention Hadoop core components?
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