Explain what does the conf.setmapper class do?
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Define the purpose of the partition function in mapreduce framework
What are the various input and output types supported by mapreduce?
Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?
What are the key differences between Pig vs MapReduce?
Mention what is the hadoop mapreduce apis contract for a key and value class?
What is Data Locality in Hadoop?
Explain task granularity
What is the process of changing the split size if there is limited storage space on Commodity Hardware?
How to compress mapper output in Hadoop?
Clarify what combiners are and when you should utilize a combiner in a map reduce job?
What is the need of MapReduce in Hadoop?
What is optimal size of a file for distributed cache?
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