Cloudera
CCD-333 · Question #26
What happens in a MapReduce job when you set the number of reducers to one?
The correct answer is C. Setting the number of reducers to one creates a processing bottleneck, and since the number. See the full explanation below for the reasoning.
Question
What happens in a MapReduce job when you set the number of reducers to one?
Options
- AA single reducer gathers and processes all the output from all the mappers. The output is
- BA single reducer gathers and processes all the output from all the mappers. The output is
- CSetting the number of reducers to one creates a processing bottleneck, and since the number
- DSetting the number of reducers to one is invalid, and an exception is thrown.
How the community answered
(26 responses)- A4% (1)
- B15% (4)
- C73% (19)
- D8% (2)
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