Unit: IV MongoDB and Node.js Quiz

What does CRUD stand for in the context of database operations?

• Create, Retrieve, Update, Delete

• Connect, Read, Update, Delete

• Connect, Retrieve, Update, Delete

• Create, Read, Update, Delete

Which method is used to insert a single document into a MongoDB collection?

• insertMany()

• insertOne()

• addDocument()

• createDocument()

What is the unique identifier field required in every MongoDB document?

• uniqueId

• documentId

• id

• _id

Which MongoDB method is used to retrieve multiple documents from a collection?

• findOne()

• fetch()

• find()

• getAll()

What does the upsert option do in the updateOne() method?

• Fetches a document

• Deletes a document if it exists

• Inserts a document if it does not exist

• Updates all documents

Which operator is used to update a field in a MongoDB document?

• $set

• $update

• $add

• $modify

What is BSON in MongoDB?

• Binary JSON

• Binary Object

• Basic JSON

• Basic Object Notation

Which method is used to delete multiple documents from a MongoDB collection?

• deleteMany()

• deleteAll()

• removeMany()

• removeAll()

What is the purpose of the findOne() method?

• To delete a document

• To update a document

• To find all documents

• To find a single document that matches a query

In which format does MongoDB store data?

• CSV

• BSON

• HTML

• XML