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.

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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. Which file is used to configure the MongoDB server?

A) mongod.conf

B) mongod.config

C) mongod.cfg

D) mongos.conf

2 / 30

2. Which MongoDB tool provides a cloud backup and recovery solution?

A) mongodump

B) mongostat

C) Ops Manager

D) MongoDB Atlas

3 / 30

3. Which command is used to enable SSL/TLS in MongoDB?

A) mongod --enableSSL

B) mongod --sslMode requireSSL

C) mongod --secure

D) mongod --encrypt

4 / 30

4. What is a chunk in MongoDB sharding?

A) A single document

B) A query router

C) A subset of data within a shard

D) A configuration file

5 / 30

5. Which MongoDB command provides statistics about memory usage and index efficiency?

A) db.indexStats()

B) db.stats()

C) db.collection.stats()

D) db.serverStatus()

6 / 30

6. Which of the following is true about MongoDB Transactions?

A) They are used for compressing data

B) They are not supported in MongoDB

C) They provide multi-document ACID compliance

D) They are only supported in single-document operations

7 / 30

7. What type of database is MongoDB considered?

A) In-Memory Database

B) Relational Database

C) Graph Database

D) NoSQL Database

8 / 30

8. What is the maximum replication lag allowed for a secondary node to participate in elections?

A) 30 seconds

B) 60 seconds

C) 120 seconds

D) 10 seconds

9 / 30

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

A) db.collection.delete()

B) db.collection.update()

C) db.collection.insert()

D) db.collection.find()

10 / 30

10. 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 are used for compressing data

D) They automatically expire data after a certain period

11 / 30

11. What is the purpose of secondary indexes?

A) To manage sharding configurations

B) To reduce document size

C) To speed up specific queries

D) To improve write performance

12 / 30

12. Which of the following is true about GridFS?

A) It backs up files

B) It compresses files

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

D) It encrypts files

13 / 30

13. Which stage limits the number of documents in an aggregation pipeline?

A) $limit

B) $skip

C) $match

D) $lm

14 / 30

14. Who were the founders of the company that developed MongoDB?

A) Bill Gates and Paul Allen

B) Dwight Merriman, Kevin P. Ryan, and Eliot Horowitz

C) Larry Page and Sergey Brin

D) Steve Jobs, Steve Wozniak, and Ronald Wayne

15 / 30

15. Which of the following is true about zone sharding?

A) It requires more config servers

B) It is slower than hashed sharding

C) It is not supported in MongoDB

D) It allows data to be distributed based on geographic zones

16 / 30

16. What is the default identifier for every MongoDB document?

A) _key

B) _id

C) _name

D) _index

17 / 30

17. Which node in a replica set handles all write operations?

A) Secondary node

B) Arbiter node

C) Hidden node

D) Primary node

18 / 30

18. What does the db.collection.find() operation do in MongoDB?

A) Deletes data

B) Inserts data

C) Updates data

D) Queries data

19 / 30

19. How many nodes are required to form a replica set in MongoDB?

A) 4

B) 3

C) 2

D) 1

20 / 30

20. How can sharding improve MongoDB performance?

A) By distributing data across multiple servers

B) By increasing document size limits

C) By disabling replication

D) By reducing index usage

21 / 30

21. How does an arbiter node help in a MongoDB replica set?

A) Votes during elections

B) Improves read performance

C) Stores data

D) Optimizes indexes

22 / 30

22. What is the purpose of relationships in MongoDB?

A) To index fields automatically

B) To store data in a single collection

C) To establish connections between data in different collections

D) To enforce strict schemas

23 / 30

23. Which feature of MongoDB is responsible for distributing data across multiple servers?

A) Transactions

B) Aggregation

C) Sharding

D) Indexing

24 / 30

24. Which of the following is true about MongoDB encryption?

A) It only encrypts data in transit

B) It does not support encryption

C) It encrypts data at rest and in transit

D) It only encrypts data at rest

25 / 30

25. What is the default validation level in MongoDB?

A) strict

B) off

C) strictValidation

D) moderate

26 / 30

26. Which of the following commands deletes a collection?

A) db.removeCollection()

B) db.collection.drop()

C) db.collection.remove()

D) db.collection.delete()

27 / 30

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

A) To create indexes

B) To backup databases

C) To restore data

D) To connect applications to MongoDB instances

28 / 30

28. How can you monitor slow queries in MongoDB?

A) By enabling the query profiler

B) By using the $lookup stage

C) By setting the mongo.logs file

D) By using the db.collection.index() command

29 / 30

29. Which of the following commands drops a database?

A) db.dropDatabase()

B) dropDatabase()

C) db.deleteDatabase()

D) db.removeDatabase()

30 / 30

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

A) To back up data

B) To compress data

C) To encrypt data

D) To start a multi-document transaction

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