A. _id
B. $default
C. _def
D. None of the mentioned
Select the wrong statement :
MongoDB also supports user-defined indexes on multiple fields called :
MongoDB uses ______ indexes to index the content stored in arrays.
MongoDB provides a ________ index type that supports searching for string content in a collection.
Indexes are typically available in ______ or located sequentially on disk.
___________ is used to determine whether a query is a covered query .
The ________ message is used to update a document in a collection.
The update() method uses the _______ command, which uses the default write concern.
An ________ query plan has returned a threshold number of matching results