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What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?
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what are the main configuration parameters that user need to specify to run Mapreduce Job ?
What is optimal size of a file for distributed cache?
What is the Reducer used for?
List the configuration parameters that have to be specified when running a MapReduce job.
What is mapper in map reduce?
How to submit extra files(jars, static files) for MapReduce job during runtime?
How to create a custom key and custom value in MapReduce Job?
Mention what is the next step after mapper or maptask?
Explain what is distributed cache in mapreduce framework?
Explain the process of spilling in Hadoop MapReduce?
Does mapreduce programming model provide a way for reducers to communicate with each other? In a mapreduce job can a reducer communicate with another reducer?
What combiners are and when you should utilize a combiner in a map reduce job?
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