Explanation:By default, the update() method updates a single document. 7. The update() method uses the _______ command, which uses the default write concern.
A. find
B. read
C. update
D. modify
Answer:A
Explanation:By default, the update() method updates a single document. 7. The update() method uses the _______ command, which uses the default write concern.
A. find B. read C. update D. modify
Explanation:The update() method returns an object that contains the status of the operation. 8. _________ is used to view statistics about the query plan for a given query.