During the standard sort and shuffle phase of MapReduce, keys and values are passed to
reducers. Which of the following is true?
A.
Keys are presented to a reducer in sorted order; values for a given key are not sorted.
B.
Keys are presented to a reducer in soiled order; values for a given key are sorted in ascending
order.
C.
Keys are presented to a reducer in random order; values for a given key are not sorted.
D.
Keys are presented to a reducer in random order; values for a given key are sorted in
ascending order.