MongoDB Quiz

What is the default port MongoDB runs on?

• 3306

• 27017

• 5432

• 8080

Which command is used to insert a document into a collection?

• db.collection.insert()

• db.collection.add()

• db.collection.put()

• db.collection.create()

Which method is used to retrieve all documents from a collection?

• db.collection.getAll()

• db.collection.readAll()

• db.collection.find()

• db.collection.select()

What does this query do? db.students.find({ name: "John" })

• Updates all students named John

• Deletes all students named John

• Finds all students with name John

• Inserts a new student named John

Which operator is used to update specific fields in a document?

• $set

• $push

• $find

• $update

Which MongoDB command is used to update a single document?

• db.collection.modifyOne()

• db.collection.update()

• db.collection.updateOne()

• db.collection.changeOne()

What type of data structure does MongoDB use to store documents?

• XML

• JSON

• BSON

• CSV

Which command will delete documents that match a condition?

• db.collection.remove()

• db.collection.deleteAll()

• db.collection.destroy()

• db.collection.truncate()

How do you view all databases in MongoDB?

• show databases

• db.show()

• display dbs

• list all

What will this command do? db.users.updateOne({name: "Alice"}, {$set: {age: 30}})

• Replaces the user "Alice"

• Sets age to 30 for all users

• Updates the age to 30 for one user named "Alice"

• Deletes the user "Alice"