C100DBA Exam Dumps - MongoDB Certified DBA Associate Questions and Answers

db.currentOp({ op : " command " })

db.adminCommand({ " all " : currentOp})

db.currentOp(true)

db.adminCommand({ currentOp : true })

db.currentOp({ " all " : true })

$sort

db.posts.createIndex({^comments.$.author " :-l});

db. posts.createIndex({^comments.author " :1});

db.posts.createIndex({^commerits.author " ;-!});

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 } } } )

Perform queries against MongoDB collections

Perform administrative tasks

Use as a JavaScript framework for your production system

When the many is not very large

When the many is very large

Always

Never

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.posts.find({ likes : { $gte : 100 , $lte : 200 } } );

db.posts.find({ likes : { $gt : 100 , $lte : 200 } } );

db.posts.find({ likes : { $gte : 100, $lt : 200 } } );

db.posts.find({ likes : { $gt : 100, $lt : 200 > > );

Code block

Name/value pair

Key

None of the above

None of the above

Object-oriented DBMS

Relational DBMS

Document-oriented DBMS