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

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

db.test.find( { a: 5, b: 3 } ).sort( { c: 1, d : 1 } )

db.test.find( { a: 5, b: 3 } ).sort( { a: 1} )

db.test.find( { a: 5, b: 3 } ).sort( { a: 1, b: 1, c: 1 > )

db.test.find( { a: 5, b: 3 } ).sort( {c: 1 } )

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