MongoDB Quiz 1

How should a jsonArray file be organized?

• As a properly formatted JSON array

• As YAML

• As plain text

• As a BSON object

What is a MongoDB document's internal data structure?

• JSON (JavaScript Object Notation)

• BSON (Binary JSON)

• ORM (object relational mode)

• MBF (MongoDB binary format)

Which projection only displays the FirstName and LastName fields of a customer collection document?

• db.customers.find({}, {firstName: 1, lastName: 1})

• db.customers.find({}, {_id:0, firstName: 1, lastName: 1})

• db.customers.find({_id: 0, year: 1, maek: 1, model: 1})

• db.customers.find({}).project({firstName: 1, lastName: 1})

MongoDB documents are atomic transaction at the level of...

• Database

• Field

• No

• Document

There is a given document from this query:

db.shoes.insertOne({type: "running", variation: [ { size: 43, color: "red" } ]})

Which of the following query for a document nested in an array?

• db.shoes.find( { "variation": { size: 43, color: red } } )

• db.shoes.find( { "variation": size: 43, color: "red" } )

• db.shoes.find( { "variation": [ size: 43, color: "red" ] } )

• db.shoes.find( { "variation": { size: 43, color: "red" } } )

Documents are stored in MongoDB called

• ODB objects

• JavaScript objects

• BSON objects

• JSON objects

Use the following syntax to search a collection and get a cursor object for the results

• findAndModify()

• query()

• find()

• findOne()

Which of these statements is true?

• The _id of a document need only be unique on the shard in which the document is housed

• If you do not specify and _id when doing an insert, the driver will create one for you

• You must specify and _id when inserting documents

• By default, there is no index on id. It is best practice to add one if you expect to query based on id.

Which of the following statements represents a legitimate JSON document?

• {Name: Schoolify, url: 'www.schoolifybd.com'}

• {Name: "Schoolify", url: www.schoolifybd.com}

• {Name: "Schoolify": url: 'www.schoolifybd.com'}

• {Name: "Schoolify", url: 'www.schoolifybd.com'}

• {Name: "Schoolify". url: 'www.schoolifybd.com'}

The maximum size for a BSON document is

• 8 megabytes

• 16 megabytes

• 4 megabytes

• 12 megabytes