What is the difference between RDBMS with Hadoop MapReduce?
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what are the most common input formats defined in Hadoop?
What is the difference between map and reduce?
What happens if the quantity of the reducer is 0 in mapreduce?
What can be optimum value for Reducer?
Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.
What does a split do?
what happens when Hadoop spawned 50 tasks for a job and one of the task failed?
What are the key differences between Pig vs MapReduce?
Developing a MapReduce Application?
What is MapReduce? What are the syntax you use to run a MapReduce program?
Explain Working of MapReduce?
Mention what is the next step after mapper or maptask?
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