Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

All collections have a unique ________ lock that allows multiple clients to modify documents in different collections at the same time.

a) writer
b) readers-writer
c) readers
d) all of the mentioned

Answer: b
Explanation: Each database has a readers-writer lock that allows concurrent read access to a database, but gives exclusive access to a single write operation per database.

Join The Discussion