what is the answer for this question can anyone tell?
Select all true statements from the following list:
MongoDB can always store duplicate documents in the same collection regardless of the _id value.
MongoDB can store duplicate documents in the same collection, as long as their _id values are different.
There is no way to ensure that duplicate records are not stored in MongoDB.
If a document is inserted without a provided _id value, then that document will fail to be inserted and cause a write error.
If a document is inserted without a provided _id value, then the _id field and value will be automatically generated for the inserted document before insertion.