Explanation:You can combine to reject documents that have duplicate values for a field but ignore documents that do not have the indexed key. 6. The ______ property of an index ensures that the index only contain entries for documents that have the indexed field.
A. Hashed
B. Unique
C. sparse
D. None of the mentioned
Answer:A
Explanation:You can combine to reject documents that have duplicate values for a field but ignore documents that do not have the indexed key. 6. The ______ property of an index ensures that the index only contain entries for documents that have the indexed field.
A. Hashed B. Unique C. sparse D. None of the mentioned
Explanation:The index skips documents that do not have the indexed field. 7. MongoDB can use the _________ of indexes to fulfill queries.