Explanation:If a document does not have a value for the indexed field in a unique index, the index will store a null value for this document. 8. Which of the following method is to verify whether MongoDB used index intersection ?
A. explain()
B. analyze()
C. intersect()
D. None of the mentioned
Answer:A
Explanation:If a document does not have a value for the indexed field in a unique index, the index will store a null value for this document. 8. Which of the following method is to verify whether MongoDB used index intersection ?
A. explain() B. analyze() C. intersect() D. None of the mentioned