What combiners is and when you should use a combiner in a MapReduce Job?
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What is the sequence of execution of map, reduce, recordreader, split, combiner, partitioner?
Explain what is distributed cache in mapreduce framework?
Is it necessary to write a mapreduce job in java?
What can be optimum value for Reducer?
what are the basic parameters of a Mapper?
Why MapReduce uses the key-value pair to process the data?
What do you mean by shuffling and sorting in MapReduce?
What do you mean by data locality?
Explain the general mapreduce algorithm
Explain how do ‘map’ and ‘reduce’ work?
Is YARN a replacement of Hadoop MapReduce?
When should you use sequencefileinputformat?
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