Explanation:MongoDB 2.2 introduced a new aggregation framework, modeled on the concept of data processing pipelines. 5. Point out the wrong statement :
A. MongoDB also provides map-reduce operations to perform aggregation
B. The pipeline provides efficient data aggregation using native operations within MongoDB
C. Map-reduce can specify a query condition to select the input documents as well as sort and limit the results
D. None of the mentioned
Answer:A
Explanation:MongoDB 2.2 introduced a new aggregation framework, modeled on the concept of data processing pipelines. 5. Point out the wrong statement :
A. MongoDB also provides map-reduce operations to perform aggregation B. The pipeline provides efficient data aggregation using native operations within MongoDB C. Map-reduce can specify a query condition to select the input documents as well as sort and limit the results D. None of the mentioned
Explanation:Aggregation is the preferred method for data aggregation in MongoDB. 6. The most basic pipeline stages provide __________ that operate like queries.