Explain about the partitioning, shuffle and sort phase
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how JobTracker schedules a task ?
What is a distributed cache in mapreduce framework?
What is Mapper in Hadoop MapReduce?
What combiners is and when you should use a combiner in a MapReduce Job?
Where sorting is done on mapper node or reducer node in MapReduce?
Clarify what is shuffling in map reduce?
When is the reducers are started in a MapReduce job?
Explain the input type/format in mapreduce by default?
What is mapreduce algorithm?
What is the difference between Reducer and Combiner in Hadoop MapReduce?
What are the benefits of Spark over MapReduce?
What is a IdentityMapper and IdentityReducer in MapReduce ?
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