Describe the output of the following mongo shell JavaScript: Object.keys(db.collection.findOne())

Choose the best description for the query below db.foo.find({ $text:{ $search:

In a sharded replicas set environment with multiple mongos servers, which would decide the mongos failover?

What do you mean by sharding?

Choose the best commands to clone a collection to a sharded cluster from a developer machine.

Which is true about sharding?

How can you create index on a particular key in MongoDB?

Which statement is valid?

Which command will return all the posts with a number of likes greater than 100 and less than 200, including the limit values ?

Which help analyze a query?

Which calls will set a 1 second limit for processing operations?