How many collections are created when use use gridfs to store large files

The equivalent for like %keyword% on mongodb find is:

Which of the following is the correct operation to query a document for both 'Football' and "Reading" within the interests data collected from a profile?

Which of the following statements are true about the MongoDB Write Consistency model

Which of the following is not a BSON serialization type?

How many data types are available in MongoDB?

In the MongoDB shell, how can you tell if an index was used with a query?

Choose the shell command that connects to a MongoDB database.

To import a JSON array into Mongo, what flags are needed with MongoDBimport?

Which command returns a specific document in the user's collection?

Given a cursor named myCursor, which command returns a boolean value?