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Explain the general mapreduce algorithm
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Explain the differences between a combiner and reducer
Why Hadoop MapReduce?
How do ‘map’ and ‘reduce’ work?
For a job in Hadoop, is it possible to change the number of mappers to be created?
What is KeyValueTextInputFormat in Hadoop MapReduce?
How many Mappers run for a MapReduce job in Hadoop?
What is the sequence of execution of map, reduce, recordreader, split, combiner, partitioner?
How much space will the split occupy in Mapreduce?
What combiners is and when you should use a combiner in a MapReduce Job?
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?
Explain combiners.
What happen if the number of the reducer is 0 in MapReduce?
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