If you are using { upsert: true } option in your update command, which of the following parameters will be used to determine if any new documents were inserted:

Which operation add a new document to the users collection ?

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

Which is captured by the Database Profiler in MongoDB ?

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 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?

Which SQL terminilogy is same as $match in MongoDB?

Which operation on a single document will operate atomically?

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