Q. Point out the wrong statement.
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(A)
Reducer has 2 primary phases
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(B)
Increasing the number of reduces increases the framework overhead, but increases load balancing and lowers the cost of failures
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(C)
It is legal to set the number of reduce-tasks to zero if no reduction is desired
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(D)
The framework groups Reducer inputs by keys (since different mappers may have output the same key) in the sort stage
✅ Correct Answer: (A)
Reducer has 2 primary phases