Câu 3: CCD-410: Cloudera Certified Developer for Apache Hadoop (CCDH)

Assuming default settings, which best describes the order of data provided to a reducer's reduce method:

1. A. The keys given to a reducer aren't in a predictable order, but the values associated with those keys always are.
2. B. Both the keys and values passed to a reducer always appear in sorted order.
3. C. Neither keys nor values are in any predictable order.
4. D. The keys given to a reducer are in sorted order but the values associated with each key are in no predictable order — đáp án hiện tại