Free CCD-410 Web TestEngine Demo

Q7 Single choice

In a MapReduce job, the reducer receives all values associated with same key.

Which statement best describes the ordering of these values?

A
The values are in sorted order.
B
The values are arbitrarily ordered, and the ordering may vary from run to run of the same MapReduce
job.
C
The values are arbitrary ordered, but multiple runs of the same MapReduce job will always have the same ordering.
D
Since the values come from mapper outputs, the reducers will receive contiguous sections of sorted values.

CCD-410 Web TestEngine demo