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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?
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In MapReduce, ideally how many mappers should be configured on a slave?
How is reporting controlled in hadoop?
Define speculative execution?
Explain task granularity
Can MapReduce program be written in any language other than Java?
Explain what you understand by speculative execution
What is map/reduce job in hadoop?
What are the data components used by Hadoop?
What is mapreduce algorithm?
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What is the difference between an RDBMS and Hadoop?
Mention what are the main configuration parameters that user need to specify to run mapreduce job?
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