In what year was MongoDB released?

How many types of locking modes exist in MongoDB?

Which of the following is not a MongoDB projection operator?

Ops Manager maintains one head database for each backed-up replica set.

Which MongoDB method is used for managing user accounts?

MongoDB is installed unattended on Windows from the command line using msiexec.exe

Which of the following information is captured by a database profiler?

The balancer migrates chunks of documents in a sharded collection to the shards associated with a tag.

The admin.system.users collection stores the user's authentication credentials as well as any roles assigned to the user.

Which of the following statements about GridFS is correct?