Which of the following operation can be optionally used for map reduce ?
A. finally
B. final
C. static
D. None of the mentioned
Answer:A
Which of the following operation can be optionally used for map reduce ?
A. finally B. final C. static D. None of the mentioned
Explanation:Certain mongo shell functions and properties are inaccessible in map-reduce operations. 10.The aggregation pipeline can use ___________ to improve its performance during some of its stages.