what are the main configuration parameters that user need to specify to run Mapreduce Job ?
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What is the key- value pair in MapReduce?
Name job control options specified by mapreduce.
What are the data components used by Hadoop?
Explain the Reducer's Sort phase?
In MapReduce Data Flow, when Combiner is called?
What do you mean by data locality?
What are the four basic parameters of a reducer?
If reducers do not start before all mappers finish then why does the progress on mapreduce job shows something like map(50%) reduce(10%)? Why reducers progress percentage is displayed when mapper is not finished yet?
What are the benefits of Spark over MapReduce?
Does mapreduce programming model provide a way for reducers to communicate with each other? In a mapreduce job can a reducer communicate with another reducer?
What is identity mapper and reducer? In which cases can we use them?
How many times combiner is called on a mapper node in Hadoop?
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