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 true about MongoDB network encryption?

A) It does not support network encryption

B) It uses RSA to encrypt data

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

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

2 / 30

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

A) Sharding

B) Indexing

C) Aggregation

D) Transactions

3 / 30

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

A) All of the above

B) One-to-Many

C) One-to-One

D) Many-to-Many

4 / 30

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

A) Use a primary-only read preference

B) Use a load balancer

C) Set read preference to secondary

D) Increase the number of indexes

5 / 30

5. What is the role of an arbiter in a replica set?

A) To store data

B) To participate in elections but not store data

C) To act as a backup node

D) To handle write operations

6 / 30

6. What is the main advantage of a TTL index in MongoDB?

A) Prevents duplicate records

B) Reduces query time

C) Improves write performance

D) Automatically deletes old documents

7 / 30

7. Which of the following is true about hashed sharding?

A) It is not supported in MongoDB

B) It uses a hash function to distribute data

C) It is slower than range-based sharding

D) It uses a range-based shard key

8 / 30

8. Which of the following is a valid BSON data type?

A) Date

B) CSV

C) YAML

D) XML

9 / 30

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

A) mongo

B) mongorestore

C) mongodump

D) mongod

10 / 30

10. Which keyword in JSON schema specifies the data type of a field?

A) type

B) schema

C) format

D) validate

11 / 30

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

A) $rename

B) $set

C) : 1

D) Alias

12 / 30

12. Which data type is used to store an array of values in MongoDB?

A) List

B) Set

C) Array

D) Collection

13 / 30

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

A) Use collMod with an empty validation object

B) db.collection.dropValidation()

C) Modify the schema to default

D) db.collection.removeValidation()

14 / 30

14. Which of the following is true about MongoDB auditing?

A) It logs all administrative actions

B) It logs all queries

C) It logs all read operations

D) It logs all write operations

15 / 30

15. Which MongoDB function ensures unique field values across documents?

A) db.collection.addConstraint()

B) db.collection.setUnique()

C) $unique

D) createIndex({field: 1}, {unique: true})

16 / 30

16. What is the purpose of the dbPath setting in mongod.conf?

A) To specify the database username

B) To enable authentication

C) To set the default port

D) To define the path for data storage

17 / 30

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

A) It requires more config servers

B) It is not supported in MongoDB

C) It can lead to uneven data distribution

D) It is slower than hashed sharding

18 / 30

18. What is the purpose of the keyFile in MongoDB?

A) To encrypt data

B) To authenticate members of a replica set

C) To compress data

D) To back up data

19 / 30

19. Which tool is used to visualize MongoDB performance metrics?

A) MongoDB Compass

B) mongostat

C) mongotop

D) db.collection.analyze()

20 / 30

20. Which command removes all documents from a collection?

A) db.collection.drop()

B) db.collection.deleteMany({})

C) db.collection.removeAll()

D) db.collection.delete()

21 / 30

21. In JSON schema, which keyword validates string formats, such as email or date?

A) type

B) format

C) pattern

D) match

22 / 30

22. What is the role of the mongos process in MongoDB sharding?

A) To route queries to the correct shard

B) To store metadata

C) To act as a config server

D) To store actual data

23 / 30

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

A) snapshot

B) majority

C) local

D) available

24 / 30

24. Which of the following operators checks whether a field exists in a document?

A) $exists

B) $include

C) $field

D) $check

25 / 30

25. Which tool restores data from a backup created by mongodump?

A) mongotop

B) mongoimport

C) mongorestore

D) mongos

26 / 30

26. 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

27 / 30

27. Which command analyzes replication performance in MongoDB?

A) db.printReplicationInfo()

B) mongostat

C) db.replicaSet.stats()

D) mongotop

28 / 30

28. What type of database is MongoDB considered?

A) Graph Database

B) Relational Database

C) In-Memory Database

D) NoSQL Database

29 / 30

29. What is the impact of having too many indexes on a collection?

A) Improved write performance

B) Improved query performance

C) Increased disk space usage

D) Slower read performance

30 / 30

30. Which JSON schema keyword specifies the maximum number of items allowed in an array?

A) maximum

B) maxItems

C) maxArraySize

D) arrayLimit

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