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. What is sharding in MongoDB?

A) A method for backing up data

B) A method for compressing data

C) A method for encrypting data

D) A method for distributing data across multiple servers

2 / 30

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

A) It is not supported in MongoDB

B) It is slower than hashed sharding

C) It requires more config servers

D) It can lead to uneven data distribution

3 / 30

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

A) They are used for encrypting data

B) They are used for compressing data

C) They support efficient queries on time-based data

D) They are not optimized for time-series data

4 / 30

4. Which tool provides real-time monitoring of MongoDB query performance?

A) mongotop

B) mongos

C) mongorestore

D) mongoimport

5 / 30

5. What does the required keyword do in a JSON schema?

A) Ensures a field is indexed

B) Prevents updates to a field

C) Sets default values for a field

D) Specifies that a field must be present in a document

6 / 30

6. Which command is used to enable sharding for a database in MongoDB?

A) sh.initiateSharding()

B) sh.enableSharding()

C) sh.startSharding()

D) sh.createSharding()

7 / 30

7. What is the primary purpose of MongoDB sharding?

A) To increase indexing speed

B) To store documents efficiently

C) To optimize query performance

D) To distribute data across multiple machines

8 / 30

8. What is a hidden node in a replica set?

A) A node that does not participate in replication

B) A node that handles only write operations

C) A node that is not visible to the application

D) A node that stores encrypted data

9 / 30

9. Which of the following is true about the votes property in a replica set?

A) It determines the storage capacity of a node

B) It determines the write concern of a node

C) It determines the read preference of a node

D) It determines whether a node can vote in elections

10 / 30

10. Which of the following operators is used to match values less than a specified value?

A) $lt

B) $gte

C) $lessthan

D) $lte

11 / 30

11. MongoDB Atlas provides which type of deployment?

A) On-premises

B) Fully managed cloud clusters

C) In-memory only

D) Private cloud only

12 / 30

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

A) Use a compound index

B) Use separate indexes for each field

C) Avoid using indexes

D) Use $regex filters

13 / 30

13. Which type of index is suitable for searching fields in natural language?

A) Geospatial Index

B) Single Field Index

C) Compound Index

D) Text Index

14 / 30

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

A) Sharding

B) Aggregation

C) Transactions

D) Indexing

15 / 30

15. How can sharding improve MongoDB performance?

A) By reducing index usage

B) By distributing data across multiple servers

C) By increasing document size limits

D) By disabling replication

16 / 30

16. Which command lists all collections in the current database?

A) show dbs

B) db.collections

C) list collections

D) show collections

17 / 30

17. Which of the following is true about GridFS?

A) It encrypts files

B) It compresses files

C) It backs up files

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

18 / 30

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

A) mongodb

B) mongosh

C) mongo shell

D) mongo-client

19 / 30

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

A) They are used for compressing data

B) They are supported only in standalone MongoDB instances

C) They are not supported in MongoDB

D) They require a replica set or sharded cluster

20 / 30

20. Which of the following is true about a shard in MongoDB?

A) It is a query router

B) It is a replica set or a standalone server

C) It is a single MongoDB instance

D) It is a configuration server

21 / 30

21. Which of the following platforms is supported by MongoDB?

A) All of the above

B) macOS

C) Linux

D) Windows

22 / 30

22. What is a shard key in MongoDB?

A) A unique identifier for each document

B) A configuration file for sharding

C) A password for accessing shards

D) A field used to partition data across shards

23 / 30

23. What is the command to insert a document into a collection?

A) db.collection.add()

B) db.collection.update()

C) db.collection.insert()

D) db.collection.create()

24 / 30

24. How can you remove validation rules from a collection?

A) db.collection.dropValidation()

B) Modify the schema to default

C) db.collection.removeValidation()

D) Use collMod with an empty validation object

25 / 30

25. What is the purpose of the $set operator in MongoDB?

A) To update specific fields

B) To create a collection

C) To replace a document

D) To remove fields from a document

26 / 30

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

A) To start a multi-document transaction

B) To encrypt data

C) To back up data

D) To compress data

27 / 30

27. Which MongoDB operation locks the database during execution?

A) find()

B) createIndex()

C) countDocuments()

D) updateMany()

28 / 30

28. Which of the following command enables authentication in MongoDB?

A) mongo --auth

B) mongo --enableAuth

C) mongod --auth

D) mongod --enableAuth

29 / 30

29. What is the primary purpose of data validation in MongoDB?

A) To manage indexes

B) To ensure that inserted or updated documents meet specific criteria

C) To enforce relationships between documents

D) To improve query performance

30 / 30

30. What is the purpose of the sh.moveChunk() command?

A) To move a chunk from one shard to another

B) To add a new shard

C) To split a chunk

D) To merge two chunks

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