___ filters the document stream to allow only matching documents to pass unmodified into the next pipeline stage.

Choose the best description of why MongoDB performs well on a non heterogeneous cluster:

Which operation on a single document will operate atomically?

Which SQL terminilogy is same as $match in MongoDB?

Which command can be used to check the size of a collection named user?

Which command can be used to check the size of a collection named user?

For a collection that represents type A { 'field1' : 'val1', 'field2' : 'val2' } Choose the best way to optimize the collection for updates if field2 is an Enumeration.

Which is captured by the Database Profiler in MongoDB ?

Which is a correct command to insert a document in a database called album and collection called songs?

The query below returns a collection of users with a projection db.users.find({}, {name: 1, _id : 1}) Choose the best statement that describes how to extract a collection of users with the projection that shows the creation date

Which operation add a new document to the users collection ?