A query may include a ___________ that specifies the fields from the matching documents to return.

Select the correct statement :

MongoDB stores all documents in :

In MongoDB, _________ operations modify the data of a single collection.

Select the wrong statement :

Which of the following operation adds a new document to the users collection ?

MongoDB process collection of documents using _________ operations.

Select the correct statement :

MongoDB scales horizontally using _________ for load balancing purpose.

Point out the wrong statement :