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Is it mandatory to set input and output type/format in MapReduce?
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Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.
How data is spilt in Hadoop?
How to get the single file as the output from MapReduce Job?
Why do we need MapReduce during Pig programming?
Write a Mapreduce Program for Character Count ?
How do Hadoop MapReduce works?
What is identity mapper and identity reducer?
What is the use of InputFormat in MapReduce process?
Clarify what combiners are and when you should utilize a combiner in a map reduce job?
What is the default input type in MapReduce?
Explain what is “map” and what is "reducer" in hadoop?
Why Mapper runs in heavy weight process and not in a thread in MapReduce?
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