Explanation: Other than the unique constraint, unique indexes are functionally interchangeable with other MongoDB indexes. 5. Point out the wrong statement :
A. TTL index is ideal for certain types of information like machine generated event data, logs, and session information that only need to persist in a database for a finite amount of time
B. You cannot combine the sparse index option with the unique index option
C. TTL indexes are special indexes that MongoDB can use to automatically remove documents from a collection after a certain amount of time
D. None of the mentioned
Answer:A
Explanation: Other than the unique constraint, unique indexes are functionally interchangeable with other MongoDB indexes. 5. Point out the wrong statement :
A. TTL index is ideal for certain types of information like machine generated event data, logs, and session information that only need to persist in a database for a finite amount of time B. You cannot combine the sparse index option with the unique index option C. TTL indexes are special indexes that MongoDB can use to automatically remove documents from a collection after a certain amount of time D. None of the mentioned
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.