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MongoDB CRUD Operations Quiz Questions
MongoDB's CRUD (Create, Read, Update, Delete) operations form the foundation of interacting with its document-based database. Whether you're a beginner learning the basics or an experienced developer refining your skills, this quiz will test your understanding of MongoDB's core CRUD functionalities and best practices.
Question 1
How do you create a database in MongoDB?
db.createDatabase("<dbname>")
new Database("<dbname>")
use <dbname>
db.new("<dbname>")
Question 2
What happens when you execute db.dropDatabase()?
Deletes the current database and all its collections
Deletes only empty collections from the database
Removes only the database name but keeps the data
Raises an error if the database is not empty
Question 3
Which method is used to delete an entire collection in MongoDB?
db.collection.removeAll()
db.collection.drop()
db.collection.deleteMany({})
db.removeCollection("<collection_name>")
Question 4
Which method allows inserting multiple documents into a MongoDB collection at once?
insertOne()
insertMany()
bulkInsert()
addDocuments()
Question 5
What does the updateOne() method do?
Updates all documents that match the filter
Updates the first matching document only
Replaces an entire document
Deletes a document before updating
Question 6
How do you delete all documents that match a given filter in MongoDB?
deleteAll()
removeMany()
deleteMany()
dropDocuments()
Question 7
How do you find a document with a specific _id in MongoDB?
db.collection.findById(id)
db.collection.find({ "_id": id })
db.collection.getDocument(id)
db.collection.findOne(id)
Question 8
What does the findOneAndDelete() method do?
Deletes all matching documents
Finds and returns a document, then deletes it
Deletes the first matching document without returning it
Deletes a document after replacing it
Question 9
How can you query for documents where a field is missing?
{ field: { $exists: false } }
{ field: { $notexists: true } }
{ field: { $missing: true } }
{ field: null }
Question 10
Which MongoDB method finds a document and updates it in one step?
updateOneAndFind()
modifyAndUpdate()
findOneAndUpdate()
replaceOneAndFind()
There are 10 questions to complete.
