MongoDB Quiz Test Online (30 random Questions) 2026

Test your MongoDB knowledge with this 30-minute quiz! Covering fundamental to advanced concepts, this quiz features 30 multiple-choice questions that will challenge your understanding of MongoDB, including data modeling, querying, indexing, and overall database management. Perfect for interview preparation and skill enhancement.

0 votes, 0 avg

You have 30 minutes to complete the quiz. The timer will start when you click the 'Start Quiz' button. Please ensure you are ready before beginning.

Time is up! Your quiz has ended. Your responses have been submitted automatically.

30 Minutes MongoDB Quiz Test Online

Test your MongoDB knowledge with this 30-minute quiz! Covering fundamental to advanced concepts, this quiz features 30 multiple-choice questions that will challenge your understanding of MongoDB, including data modeling, querying, indexing, and overall database management. Perfect for interview preparation and skill enhancement.

1 / 30

1. What is the role of an arbiter in a replica set?

A) To act as a backup node

B) To participate in elections but not store data

C) To handle write operations

D) To store data

2 / 30

2. Which validation action is the most restrictive?

A) error

B) moderate

C) warn

D) strict

3 / 30

3. Which $lookup parameter defines the collection to join?

A) from

B) localField

C) foreignField

D) as

4 / 30

4. Which MongoDB method skips a specific number of documents in query results?

A) db.collection.query.skip(n)

B) db.collection.find().skip(n)

C) db.collection.limit().skip(n)

D) db.collection.skip()

5 / 30

5. What is the default heartbeat interval for replica set members in MongoDB?

A) 10 seconds

B) 30 seconds

C) 1 second

D) 2 seconds

6 / 30

6. What is the purpose of the startTransaction() command in MongoDB?

A) To encrypt data

B) To compress data

C) To back up data

D) To start a multi-document transaction

7 / 30

7. What happens if you try to insert a duplicate value into a field with a unique index?

A) The duplicate value is ignored.

B) A new unique index is created.

C) The document is inserted without the duplicate value.

D) The operation fails with an error.

8 / 30

8. Which keyword in JSON schema specifies the data type of a field?

A) format

B) type

C) schema

D) validate

9 / 30

9. Which storage option ensures faster reads for frequently accessed data?

A) In-memory storage

B) Compressed storage

C) Distributed storage

D) Disk-based storage

10 / 30

10. Which of the following is true about GridFS?

A) It compresses files

B) It stores files in two collections: fs.files and fs.chunks

C) It backs up files

D) It encrypts files

11 / 30

11. How does MongoDB ensure write durability?

A) By enabling journaling

B) By creating multiple indexes

C) By sharding data

D) Using query profiling

12 / 30

12. Which command is used to enable role-based access control (RBAC) in MongoDB?

A) mongod --auth

B) mongod --enableRBAC

C) mongod --role

D) mongod --secure

13 / 30

13. Which read concern level ensures only committed data is read?

A) local

B) snapshot

C) available

D) majority

14 / 30

14. How do you create a unique index in MongoDB?

A) db.collection.index({ field: 1, unique: true })

B) db.collection.addUniqueIndex({ field: 1 })

C) db.collection.createUniqueIndex({ field: 1 })

D) db.collection.createIndex({ field: 1 }, { unique: true })

15 / 30

15. Which of the following is true about Change Streams?

A) They can monitor changes to a single collection

B) All of the above

C) They can monitor changes to an entire database

D) They can monitor changes to a replica set

16 / 30

16. How can you check the structure of a collection's documents?

A) db.collection.structure()

B) db.collection.show()

C) db.collection.findOne()

D) db.collection.explain()

17 / 30

17. What is the purpose of the $unset operator?

A) To remove fields from a document

B) To replace a collection

C) To delete a document

D) To add new fields

18 / 30

18. What is the default collation for indexes in MongoDB?

A) Case-insensitive

B) Case-sensitive

C) Language-specific

D) Binary

19 / 30

19. Which of the following MongoDB operations is used to update an existing document?

A) db.collection.find()

B) db.collection.update()

C) db.collection.insert()

D) db.collection.delete()

20 / 30

20. Which of the following methods creates a new collection?

A) db.createCollection()

B) db.collection.new()

C) db.collection.insert()

D) db.newCollection()

21 / 30

21. Which operator is used to match multiple conditions that must all be true?

A) $nor

B) $not

C) $or

D) $and

22 / 30

22. What is the purpose of the db.dropUser() command?

A) To encrypt data

B) To back up data

C) To create a new user

D) To delete an existing user

23 / 30

23. What is the default database created during MongoDB installation?

A) config

B) admin

C) test

D) None

24 / 30

24. Which data type is used to store an array of values in MongoDB?

A) Collection

B) Set

C) List

D) Array

25 / 30

25. What is the default installation directory for MongoDB on Windows?

A) C:MongoDBbin

B) C:Program FilesMongoDB

C) C:NoSQLMongoDB

D) C:Program FilesNoSQLMongoDB

26 / 30

26. Which of the following is true about the shardCollection command?

A) It removes a shard

B) It enables sharding for a database

C) It adds a new shard

D) It shards a specific collection

27 / 30

27. MongoDB Atlas provides which type of deployment?

A) Fully managed cloud clusters

B) Private cloud only

C) In-memory only

D) On-premises

28 / 30

28. Which of the following commands is used to take a backup of MongoDB data?

A) mongorestore

B) mongodump

C) mongoimport

D) mongoexport

29 / 30

29. What does the $unwind stage do in an aggregation pipeline?

A) Removes duplicate documents

B) Combines multiple fields into an array

C) Filters documents based on an array

D) Breaks an array field into multiple documents

30 / 30

30. Which command is used to create a user in MongoDB?

A) db.newUser()

B) db.createUser()

C) db.insertUser()

D) db.addUser()

Your score is

The average score is 29%

Rate Your Experience!

Anonymous feedback

Thank you for your feedback! We appreciate your input.

10 Minutes Angular Quiz Test Online

CSS Quiz Test Online (30 random Questions)

10 Minutes Docker Quiz Test Online

Bootstrap Quiz Test Online (30 random Questions)

HTML Quiz Test Online

Online Quiz Test (with time limit)

Related