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 of the following is NOT a key advantage of MongoDB?

A) High availability

B) Schema flexibility

C) Fixed schema

D) Horizontal scaling

2 / 30

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

A) Tuple

B) Row

C) Document

D) Table

3 / 30

3. What does the --bind_ip option specify in the MongoDB server?

A) IP addresses allowed to connect to the server

B) Authentication method

C) Path for logs

D) Port for the server to listen on

4 / 30

4. What is the primary disadvantage of range-based sharding?

A) It is slower than hashed sharding

B) It can lead to uneven data distribution

C) It requires more config servers

D) It is not supported in MongoDB

5 / 30

5. Which of the following is true about secondary nodes?

A) They handle all write operations

B) They replicate data from the primary node

C) They do not participate in elections

D) They are read-only

6 / 30

6. What is the default write concern in a replica set?

A) {w: 1}

B) {w: 2}

C) {w: "majority"}

D) {w: "all"}

7 / 30

7. Which MongoDB operation locks the database during execution?

A) find()

B) countDocuments()

C) updateMany()

D) createIndex()

8 / 30

8. What is the primary command to start the MongoDB server?

A) mongo

B) mongod

C) mongorestore

D) mongodump

9 / 30

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

A) snapshot

B) majority

C) local

D) available

10 / 30

10. What is the command to create a text index in MongoDB?

A) db.collection.createIndex({ field: "text" })

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

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

D) db.collection.addTextIndex({ field: 1 })

11 / 30

11. Which of the following is the best practice for queries that filter on multiple fields?

A) Use separate indexes for each field

B) Use $regex filters

C) Avoid using indexes

D) Use a compound index

12 / 30

12. Which aggregation stage is used to filter documents based on specified conditions?

A) $sort

B) $match

C) $group

D) $project

13 / 30

13. What is MongoDB Atlas?

A) A cloud-based database service

B) A backup tool

C) A GUI for managing databases

D) A command-line tool for MongoDB

14 / 30

14. What is an advantage of using embedded documents over references?

A) Faster read performance

B) Increased flexibility

C) Reduced document size

D) Data normalization

15 / 30

15. Which index type is created by default for every MongoDB collection?

A) Geospatial index

B) Compound index

C) Single-field index on _id

D) Text index

16 / 30

16. MongoDB uses which of the following as its default index for every document?

A) _index

B) _key

C) _id

D) _name

17 / 30

17. How are One-to-One relationships typically modeled in MongoDB?

A) Both B and C

B) Using references with $lookup

C) Using arrays

D) Using embedded documents

18 / 30

18. What is GridFS in MongoDB?

A) A feature for storing and retrieving large files

B) A feature for compressing data

C) A feature for encrypting data

D) A feature for backing up data

19 / 30

19. Which of the following is NOT a key advantage of MongoDB?

A) High availability

B) Fixed schema

C) Horizontal scaling

D) Schema flexibility

20 / 30

20. Which stage is used to sort documents in an aggregation pipeline?

A) $sort

B) $group

C) $project

D) $match

21 / 30

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

A) mongod --logAudit

B) mongod --enableAudit

C) mongod --audit

D) mongod --auditDestination file

22 / 30

22. What does the $lookup stage in aggregation do?

A) Creates indexes for relationships

B) Deletes related documents

C) Embeds documents in a collection

D) Joins data from two collections

23 / 30

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

A) To determine the likelihood of a node becoming primary

B) To determine the read preference of a node

C) To determine the write concern of a node

D) To determine the storage capacity of a node

24 / 30

24. Which MongoDB feature allows real-time data updates across related documents?

A) $lookup

B) Aggregation

C) Triggers

D) Change Streams

25 / 30

25. Which command is used to add a shard to a sharded cluster?

A) sh.enableShard()

B) sh.addShard()

C) sh.startShard()

D) sh.createShard()

26 / 30

26. Which command is used to check the status of a replica set?

A) rs.health()

B) rs.check()

C) rs.info()

D) rs.status()

27 / 30

27. How do indexes affect write performance in MongoDB?

A) They slow down write performance slightly.

B) They have no impact on write performance.

C) They prevent write operations.

D) They improve write performance.

28 / 30

28. What type of index is automatically created for every MongoDB collection?

A) Text Index

B) Compound Index

C) Single Field Index on _id

D) Geospatial Index

29 / 30

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

A) Sharding

B) Transactions

C) Aggregation

D) Indexing

30 / 30

30. What is the format used by MongoDB to store data?

A) CSV

B) BSON

C) JSON

D) XML

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