What is the difference between Sharding and Replication ?

Which operation will write the resulting documents of the aggregation pipeline to a collection in MongoDB?

Query shape consists of a combination of query, sort, and _____ specifications.

Which command inside aggregate command is used in MongoDB aggregation to filter the documents to pass only the documents that match the specified condition to the next pipeline stage?

Which is the most suitable advantage of using embedded documents?

What can be done to optimize aggregation pipeline?

Which of the read preference modes in a replica set configuration specify the operations to be read from the node whose network latency falls within the acceptable latency window?

You are setting up replication for a mongodb cluster and you get the following error 'no replset config has been received'. Choose the most probable reason:

You have a 10G primary partition with your data in in ' /var/lib/mongodb/'. Choose the best option to transfer data to a larger partition:

Which call will remove all users who are older than 21 from Users collection?