Explanation:MongoDB provides a rich set of aggregation operations that examine and perform calculations on the data sets. 2. Point out the wrong statement :
A. Map-reduce cannot have a finalize stage to make final modifications to the result
B. Map-reduce is less efficient and more complex than the aggregation pipeline
C. Specifically, a user with the userAdmin role can grant itself any privilege in the database
D. All of the mentioned
Answer:A
Explanation:MongoDB provides a rich set of aggregation operations that examine and perform calculations on the data sets. 2. Point out the wrong statement :
A. Map-reduce cannot have a finalize stage to make final modifications to the result B. Map-reduce is less efficient and more complex than the aggregation pipeline C. Specifically, a user with the userAdmin role can grant itself any privilege in the database D. All of the mentioned
Explanation:In general, map-reduce operations have two phases: a map stage that processes each document and emits one or more objects for each input document, and reduce phase that combines the output of the map operation. 3. Running data aggregation on the ________ instance simplifies application code and limits resource requirements.