Why MapReduce uses the key-value pair to process the data?
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What can be optimum value for Reducer?
What is the core of the job in MapReduce framework?
How to submit extra files(jars,static files) for MapReduce job during runtime in Hadoop?
What does a split do?
What are the identity mapper and reducer in MapReduce?
Why Mapreduce output written in local disk?
What is reduce side join in mapreduce?
What is map/reduce job in hadoop?
Is reduce-only job possible in Hadoop MapReduce?
What do sorting and shuffling do?
Can you tell us how many daemon processes run on a hadoop system?
What is the process of changing the split size if there is limited storage space on Commodity Hardware?
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