

InterviewSolution
Saved Bookmarks
1. |
MongoDB uses a ____________ lock that allows concurrent read access to a database but exclusive write access to a single write operation.(a) readers(b) readers-writer(c) writer(d) none of the mentioned |
Answer» The correct answer is (b) readers-writer To elaborate: Before version 2.2, this lock was implemented on a per-mongod basis. Since version 2.2, the lock has been implemented at the database level. |
|