C100DBA Exam Dumps : MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4)

db.inventory.find( { ratings: { $elemMatch: { $gte: 3, $lte: 6 } } } )

db.inventory.find( { ratings: { $elemMatch: { $gt: 3, $lt: 6 }

db.inventory.find( { ratings: { ratings.$: { $gt: 5, $lt: 9 } } } )

db.inventory.find( { ratings: { ratings: { $gt: 5, $lt: 9 } } } )

A document will be inserted with the same _id as the last document inserted

A document that matches the collection's existing schema, but with null fields

A document with an _id assigned to be an Objectld

An empty document

No document will be inserted; an error will be raised

Members of a replica set may replicate data from any other data-bearing member of the set by default

Clients read from the nearest member of a replica ser by default

Operations on the primary are recorded in a capped collection called the oplog