What is Profiler?

Which collections are used by MongoDB to store GridFS data?

Which is correct for _id in MongoDB?

Which method can be used in MongoDB for relating documents?

Which is a primary key in MongoDB?

What is the default size of GridFS chunk?

Which option exist in ensureIndex method?

Which is stage of aggregation?

Which is true? Check all that apply.

Choose the best description of the query below:- db.users.find ({ 'name' : /m/i } ).pretty()

Under what conditions is it required to use the db.getCollection() method in the mongo shell to delete a collection?