Q. What is the primary purpose of the Hadoop MapReduce "In-Mapper Combining" technique?
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(A)
Combine intermediate key-value pairs on the mapper side
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(B)
Aggregate values on the reducer side
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(C)
Sort and shuffle data
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(D)
Distribute data to reducers
✅ Correct Answer: (A)
Combine intermediate key-value pairs on the mapper side