Which of the following is not a projection operator ?
A. $slice
B. $elemMatch
C. $
D. None of the mentioned
Answer:A
Which of the following is not a projection operator ?
A. $slice B. $elemMatch C. $ D. None of the mentioned
Explanation:For fields that contain arrays, MongoDB provides the following projection operators: $elemMatch, $slice, and $. Sanfoundry Global Education & Learning Series – MongoDB.