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What are the data components used by Hadoop?
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What is the difference between an RDBMS and Hadoop?
Explain what is “map” and what is "reducer" in hadoop?
Is it legal to set the number of reducer task to zero? Where the output will be stored in this case?
How can we control particular key should go in a specific reducer?
Define MapReduce?
Where sorting is done in Hadoop MapReduce Job?
What are combiners? When should I use a combiner in my MapReduce Job?
What is a RecordReader in Hadoop MapReduce?
What happen if the number of the reducer is 0 in MapReduce?
What is the difference between RDBMS with Hadoop MapReduce?
What is the role of recordreader in hadoop mapreduce?
Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.
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