____________ returns information on the query plan for aggregate function.
A. Reporter
B. db.collection.explain()
C. db.collection.explainplan()
D. None of the mentioned
Answer:A
____________ returns information on the query plan for aggregate function.
A. Reporter B. db.collection.explain() C. db.collection.explainplan() D. None of the mentioned
Explanation:MongoDB runs the query optimizer to choose the winning plan for the operation under evaluation. 10.By default, db.collection.explain() runs in ___________ verbosity mode.