What are the the issues associated with the map and reduce slots based mechanism in mapReduce?
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Which Sorting algorithm is used in Hadoop MapReduce?
What is MapReduce in Hadoop?
What is the role of a MapReduce partitioner?
Explain how do ‘map’ and ‘reduce’ work?
when do reducers play their role in a mapreduce task?
Explain about the partitioning, shuffle and sort phase in MapReduce?
What is the InputSplit in map reduce ?
how Hadoop is different from other data processing tools?
When should you use a reducer?
What is the difference between Reducer and Combiner in Hadoop MapReduce?
What do you mean by inputformat?
What is identity mapper and chain mapper?
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