MongoDB Quiz Test Online (30 random Questions) 2025

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.

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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. How can sharding improve MongoDB performance?

A) By disabling replication

B) By distributing data across multiple servers

C) By increasing document size limits

D) By reducing index usage

2 / 30

2. Which of the following is true about MongoDB network encryption?

A) It uses SSL/TLS to encrypt data in transit

B) It uses AES-256 to encrypt data at rest

C) It uses RSA to encrypt data

D) It does not support network encryption

3 / 30

3. What is a potential drawback of using $lookup?

A) Reduced query flexibility

B) Increased query execution time

C) Requires schema enforcement

D) Limited support for text fields

4 / 30

4. What does the $regex operator do?

A) Checks if a field exists

B) Matches values not in an array

C) Matches values based on a regular expression

D) Matches values equal to a string

5 / 30

5. How can you update validation rules for an existing collection?

A) db.collection.resetValidation()

B) db.collection.modifyRules()

C) db.runCommand({ collMod })

D) db.collection.updateValidation()

6 / 30

6. Which MongoDB feature prevents large write operations from overwhelming the database?

A) Capped collections

B) Query profiler

C) Read preference

D) Write concern

7 / 30

7. What is the role of a delayed secondary node?

A) To act as an arbiter

B) To handle write operations

C) To delay replication for disaster recovery purposes

D) To speed up replication

8 / 30

8. Which of the following operations is used to insert a document into a MongoDB collection?

A) db.collection.update()

B) db.collection.insert()

C) db.collection.find()

D) db.collection.delete()

9 / 30

9. What is the default chunk size in MongoDB?

A) 128 MB

B) 64 MB

C) 512 MB

D) 256 MB

10 / 30

10. Which tool provides graphical monitoring and real-time analysis for MongoDB?

A) MongoDB Compass

B) mongotop

C) Ops Manager

D) mongosh

11 / 30

11. What is the role of config servers in MongoDB sharding?

A) To store the actual data

B) To route queries to shards

C) To store metadata and configuration information

D) To act as a backup server

12 / 30

12. In MongoDB, what is used to represent a single record of data?

A) Document

B) Tuple

C) Row

D) Table

13 / 30

13. What is a key limitation of Many-to-Many relationships modeled with arrays?

A) Array size limit

B) Harder to query

C) Cannot use indexes

D) Data duplication

14 / 30

14. Which of the following is true about Time-series Collections?

A) They are not optimized for time-series data

B) They are used for encrypting data

C) They automatically expire data after a certain period

D) They are used for compressing data

15 / 30

15. What is the purpose of the mongoURI connection string?

A) To restore data

B) To create indexes

C) To connect applications to MongoDB instances

D) To backup databases

16 / 30

16. What is the purpose of the priority property in a replica set?

A) To determine the read preference of a node

B) To determine the storage capacity of a node

C) To determine the write concern of a node

D) To determine the likelihood of a node becoming primary

17 / 30

17. Which MongoDB component is responsible for routing queries in a sharded cluster?

A) mongod

B) mongotop

C) mongostat

D) mongos

18 / 30

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

A) db.addUser()

B) db.newUser()

C) db.createUser()

D) db.insertUser()

19 / 30

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

A) mongod --role

B) mongod --enableRBAC

C) mongod --secure

D) mongod --auth

20 / 30

20. Which of the following operators is used to match multiple values in MongoDB?

A) $and

B) $in

C) $match

D) $or

21 / 30

21. Where is data validation implemented in MongoDB?

A) At the database level

B) At the server level

C) At the field level

D) At the collection level

22 / 30

22. Which operator is used to match all values in an array?

A) $all

B) $and

C) $exists

D) $in

23 / 30

23. Which command is used to access the MongoDB shell?

A) mongo-client

B) mongosh

C) mongodb

D) mongo shell

24 / 30

24. Which command is used to create a collection with validation rules?

A) db.createCollection()

B) db.collection.addValidationRules()

C) db.newCollection()

D) db.collection.setValidation()

25 / 30

25. Which command is used to enable auditing in MongoDB?

A) mongod --logAudit

B) mongod --auditDestination file

C) mongod --audit

D) mongod --enableAudit

26 / 30

26. Which command is used to retrieve a file from GridFS?

A) fs.chunks.retrieve()

B) fs.files.retrieve()

C) gridfs.retrieve()

D) mongofiles

27 / 30

27. Which stage is used to skip a specified number of documents in the pipeline?

A) $limit

B) $jump

C) $skip

D) $match

28 / 30

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

A) db.collection.skip()

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

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

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

29 / 30

29. Which MongoDB query method limits the output to specified fields only?

A) db.collection.find({}, { field: 1 })

B) db.collection.find({}, { fields })

C) db.collection.query({ fields: 1 })

D) db.collection.select({ field })

30 / 30

30. Which is a drawback of embedding data for relationships?

A) Requires additional queries

B) Inefficient indexing

C) Data duplication

D) Increased write complexity

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