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. Which of the following is a NoSQL feature of MongoDB?

A) Fixed relationships

B) Flexible schema design

C) ACID transactions

D) Table joins

2 / 30

2. Which MongoDB version introduced schema validation?

A) 3.2

B) 4.0

C) 4.2

D) 2.4

3 / 30

3. What is the purpose of the withTransaction() method in MongoDB?

A) To execute a transaction

B) To back up data

C) To compress data

D) To encrypt data

4 / 30

4. Which of the following is a valid MongoDB query operator?

A) $gt

B) $search

C) $contains

D) $like

5 / 30

5. What is the purpose of Time-series Collections in MongoDB?

A) To store and query time-series data efficiently

B) To encrypt data

C) To back up data

D) To compress data

6 / 30

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

A) $lt

B) $lte

C) $gte

D) $lessthan

7 / 30

7. What is the purpose of the db.grantRolesToUser() command?

A) To back up data

B) To encrypt data

C) To create a new user

D) To assign roles to an existing user

8 / 30

8. Which operator is used to match documents where a field's value is greater than a specified value?

A) $gte

B) $lt

C) $lte

D) $gt

9 / 30

9. How do you include only specific fields in a query result?

A) { field: true }

B) { field: 1 }

C) { field: include }

D) { field: 0 }

10 / 30

10. How can you monitor slow queries in MongoDB?

A) By using the $lookup stage

B) By setting the mongo.logs file

C) By enabling the query profiler

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

11 / 30

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

A) To route queries to shards

B) To act as a backup server

C) To store the actual data

D) To store metadata and configuration information

12 / 30

12. Which of the following is a key feature of MongoDB?

A) Supports only text data

B) Fixed schema

C) SQL support

D) High availability and scalability

13 / 30

13. Which of the following is true about MongoDB collections?

A) They are schema-less.

B) They do not support indexing.

C) They require a fixed schema.

D) Fields must be consistent across all documents.

14 / 30

14. Which of the following commands drops a database?

A) dropDatabase()

B) db.dropDatabase()

C) db.deleteDatabase()

D) db.removeDatabase()

15 / 30

15. Which of the following is true about GridFS?

A) It splits large files into smaller chunks

B) It compresses large files

C) It backs up large files

D) It encrypts large files

16 / 30

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

A) XML

B) JSON

C) CSV

D) BSON

17 / 30

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

A) Larry Page and Sergey Brin

B) Bill Gates and Paul Allen

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

D) Steve Jobs, Steve Wozniak, and Ronald Wayne

18 / 30

18. Which operator is used in $project to rename a field?

A) $set

B) Alias

C) : 1

D) $rename

19 / 30

19. What is the purpose of the unique option when creating an index?

A) To allow duplicate values in the index

B) To improve sorting performance

C) To make the index case-sensitive

D) To enforce unique values for the indexed field

20 / 30

20. Which of the following is true about MongoDB field-level encryption?

A) It encrypts the entire database

B) It is not supported in MongoDB

C) It encrypts only the _id field

D) It encrypts specific fields in a document

21 / 30

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

A) 60 seconds

B) 10 seconds

C) 120 seconds

D) 30 seconds

22 / 30

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

A) db.collection.insert()

B) db.collection.update()

C) db.collection.find()

D) db.collection.delete()

23 / 30

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

A) It uses RSA to encrypt data

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

C) It does not support network encryption

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

24 / 30

24. What is the recommended way to avoid performance issues with $or queries?

A) Optimize indexes for each condition

B) Use $and instead of $or

C) Avoid combining conditions

D) Always use aggregation pipelines

25 / 30

25. How can you distribute query load across multiple replica set members?

A) Use a load balancer

B) Use a primary-only read preference

C) Set read preference to secondary

D) Increase the number of indexes

26 / 30

26. In which situation is embedding a poor choice for modeling relationships?

A) When there is a One-to-One relationship

B) When related data grows without limits

C) When queries require frequent joins

D) When related data rarely changes

27 / 30

27. Which role provides full administrative access to a MongoDB database?

A) dbAdmin

B) read

C) root

D) readWrite

28 / 30

28. What is the purpose of mongoURI?

A) Restores a database

B) Specifies a connection string to MongoDB

C) Exports database schemas

D) Connects to replica sets

29 / 30

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

A) Horizontal scaling

B) Schema flexibility

C) High availability

D) Fixed schema

30 / 30

30. What is the correct order of stages in the aggregation pipeline?

A) Any order

B) $group → $project → $match

C) $match → $group → $project

D) $project → $match → $group

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