Clarify what is shuffling in map reduce?
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what happens when Hadoop spawned 50 tasks for a job and one of the task failed?
What do you know about nlineinputformat?
For a job in Hadoop, is it possible to change the number of mappers to be created?
what does the conf.setMapper Class do ?
What are the fundamental configurations parameters specified in map reduce?
Is YARN a replacement of Hadoop MapReduce?
What is the sequence of execution of map, reduce, recordreader, split, combiner, partitioner?
What is Reduce only jobs?
When should you use sequencefileinputformat?
Explain JobConf in MapReduce.
Explain the Reducer's Sort phase?
Compare Pig vs Hive vs Hadoop MapReduce?
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