D. all of the mentioned
____________ are operations that process data records and return computed results.
Select the wrong statement :
Running data aggregation on the ________ instance simplifies application code and limits resource requirements.
Documents enter a multi-stage __________ that transforms the documents into an aggregated result.
Map-reduce uses custom __________ functions to perform the map and reduce operations.
Which of the following operation can be optionally used for map reduce ?
The aggregation pipeline can use ___________ to improve its performance during some of its stages.
______ returns true if the first value is less than the second.
$ne returns true if the values are not _______
$multiply __________ numbers to return the result.