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In MapReduce Data Flow, when Combiner is called?
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Mention when to use Map reduce mode?
Explain what is shuffling in mapreduce?
What happens when a DataNode fails during the write process?
With the help of two examples name the map and reduce function purpose
What is the role of a MapReduce partitioner?
What combiners are and when you should utilize a combiner in a map reduce job?
What are the various InputFormats in Hadoop?
What do you mean by shuffling and sorting in MapReduce?
Different ways of debugging a job in MapReduce?
How many Mappers run for a MapReduce job in Hadoop?
When the reducers are are started in a mapreduce job?
What is an identity mapper and identity reducer?
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