Latest MongoDB Quiz – An Excellent Way to Analyse Your Skills

Which one is best to explain about MongoDB processes?

With which storage engine does MongoDB uses memory mapped files to store data?

What will be the output –
db.posts.find( { likes : { $gt : 200 }, likes : { $lt : 400 } } );

Which statement is correct:

Indexes supported by MongoDB:

Which of the following can provide an insight of MongoDB’s memory usage?

What is the output of the following query:
db.posts.aggregate( [ { $group: { _id: “$author”, x: { $sum: $likes } } } ] )

Which field provides the amount of resident memory in use?

Which operator can reverse the effects of a double unwind operation?

Choose the wrong statement:

The maximum size of a MongoDB document is

What option is used with update command so that a new document gets created if no matching document is found based on the query condition?