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.

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 a replica set in MongoDB?

A) A backup of the database

B) A sharded cluster

C) A single MongoDB instance

D) A group of MongoDB instances that maintain the same data set

2 / 30

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

A) Embeds documents in a collection

B) Joins data from two collections

C) Creates indexes for relationships

D) Deletes related documents

3 / 30

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

A) Primary node

B) Arbiter node

C) Secondary node

D) Hidden node

4 / 30

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

A) CSV

B) XML

C) BSON

D) JSON

5 / 30

5. Which type of index is used to support text search in MongoDB?

A) Compound Index

B) Full-text Index

C) Text Index

D) Geospatial Index

6 / 30

6. Which of the following is used to update a document in a collection?

A) db.collection.save()

B) db.collection.update()

C) db.collection.modify()

D) db.collection.findAndUpdate()

7 / 30

7. What is the primary purpose of the $project stage in MongoDB?

A) Filters documents

B) Includes or excludes fields in the output

C) Groups documents by a specified field

D) Sorts documents

8 / 30

8. 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

9 / 30

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

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

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

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

D) db.collection.skip()

10 / 30

10. Which validation level allows invalid documents to exist but prevents new invalid documents from being added?

A) loose

B) strict

C) moderate

D) off

11 / 30

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

A) To backup databases

B) To connect applications to MongoDB instances

C) To restore data

D) To create indexes

12 / 30

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

A) Disk-based storage

B) Compressed storage

C) In-memory storage

D) Distributed storage

13 / 30

13. 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

14 / 30

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

A) db.createUser()

B) db.newUser()

C) db.addUser()

D) db.insertUser()

15 / 30

15. Which tool is used to import data into MongoDB from JSON or CSV files?

A) mongodump

B) mongoexport

C) mongoimport

D) mongotop

16 / 30

16. What is the purpose of the $limit stage in the aggregation pipeline?

A) Joins two collections

B) Filters documents based on conditions

C) Restricts the number of documents processed

D) Groups documents by a field

17 / 30

17. What is the default authentication mechanism in MongoDB?

A) LDAP

B) SCRAM-SHA-1

C) X.509

D) Kerberos

18 / 30

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

A) $skip

B) $limit

C) $match

D) $lm

19 / 30

19. What is the primary purpose of MongoDB sharding?

A) To distribute data across multiple machines

B) To store documents efficiently

C) To increase indexing speed

D) To optimize query performance

20 / 30

20. What is the purpose of relationships in MongoDB?

A) To enforce strict schemas

B) To index fields automatically

C) To establish connections between data in different collections

D) To store data in a single collection

21 / 30

21. What type of MongoDB node can serve read requests in a replica set?

A) Primary node only

B) Arbiter node

C) Secondary node only

D) Both primary and secondary nodes

22 / 30

22. In a normalized data model, where are related data stored?

A) In the same document

B) As an index

C) In an array field

D) In a separate collection

23 / 30

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

A) Faster read performance

B) Reduced document size

C) Data normalization

D) Increased flexibility

24 / 30

24. Which relationship type is best handled using arrays of embedded documents?

A) One-to-Many

B) Many-to-Many

C) One-to-One

D) All of the above

25 / 30

25. What type of model does MongoDB use for data representation?

A) Columnar

B) Object

C) Tabular

D) Document

26 / 30

26. How can you optimize MongoDB performance in a high-write workload?

A) Disable journaling

B) Use replication and sharding

C) Increase index size

D) Reduce memory allocation

27 / 30

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

A) They are supported only in standalone MongoDB instances

B) They are used for compressing data

C) They are not supported in MongoDB

D) They require a replica set or sharded cluster

28 / 30

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

A) To act as an arbiter

B) To speed up replication

C) To delay replication for disaster recovery purposes

D) To handle write operations

29 / 30

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

A) They are not supported in MongoDB

B) They provide multi-document ACID compliance

C) They are used for compressing data

D) They are only supported in single-document operations

30 / 30

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

A) db.collection.findOne()

B) db.collection.structure()

C) db.collection.show()

D) db.collection.explain()

Your score is

The average score is 30%

Rate Your Experience!

Anonymous feedback

Thank you for your feedback! We appreciate your input.

10 Minutes HTML Quiz Test Online

10 Minutes JavaScript Quiz Test Online

SQL Quiz Test Online (30 random Questions)

Angular Quiz Test Online (30 random Questions)

CSS Quiz Test Online (30 random Questions)

JavaScript Quiz Test Online (30 random Questions)

Related