Câu 16: C100DBA: MongoDB Associate Database Administrator

What is the purpose of the oplog?

1. A. A rolling record of all operations that modify the data stored in your databases. — đáp án hiện tại
2. B. A rolling record of all queries ran on the databases.
3. C. A rolling record of all operations and users stored in your databases.
4. D. A rolling record of all indexes stored in your databases.