You have just secured your previously unsecured MongoDB server, but the server is still not requiring authentication. What is the best option?

What is the most accurate statement regarding MongoDB and ad hoc queries?

In MongoDB, what does a projection do?

To remove a database and all of its records from MongoDB, what operator should you use?

What option can be passed to start the MongoDB shell without connecting to a database?

How can you improve the appearance of the output JSON that contains the _id?

The map-reduce operation uses a temporary collection for data processing; The benefit of this behavior is that the operations:

To create an index for user_name field on user collection, which of the following is the correct syntax?

Which platform does MongoDB support?

When a journal file holds 1 gigabyte of data, MongoDB creates a new journal file?

Instead of tables, MongoDB stores data in structures called: