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 mentionedI got this question in examination.The above asked question is from Big data and MongoDB topic in portion MongoDB and noSQL Concepts of MongoDB

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.



Discussion

No Comment Found

Related InterviewSolutions