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What is identity mapper and chain mapper?
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what daemons run on a master node and slave nodes?
What are the the issues associated with the map and reduce slots based mechanism in mapReduce?
How many Reducers run for a MapReduce job in Hadoop?
How do reducers communicate with each other?
How to specify more than one directory as input in the Hadoop MapReduce Program?
In MapReduce, ideally how many mappers should be configured on a slave?
What are combiners? When should I use a combiner in my MapReduce Job?
Why comparison of types is important for MapReduce?
Is it important for Hadoop MapReduce jobs to be written in Java?
What is an input reader in reference to mapreduce?
Explain what is shuffling in mapreduce?
How do Hadoop MapReduce works?
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