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

A) To participate in elections but not store data

B) To store data

C) To act as a backup node

D) To handle write operations

2 / 30

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

A) Supports only text data

B) High availability and scalability

C) Fixed schema

D) SQL support

3 / 30

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

A) A node that does not participate in replication

B) A node that stores encrypted data

C) A node that handles only write operations

D) A node that is not visible to the application

4 / 30

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

A) root

B) readWrite

C) dbAdmin

D) read

5 / 30

5. Which of the following commands deletes a collection?

A) db.removeCollection()

B) db.collection.remove()

C) db.collection.delete()

D) db.collection.drop()

6 / 30

6. What is the default port for MongoDB?

A) 3306

B) 5432

C) 8080

D) 27017

7 / 30

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

A) $gte

B) $lte

C) $gt

D) $lt

8 / 30

8. Which stage is used to skip a specified number of documents in the pipeline?

A) $skip

B) $jump

C) $match

D) $limit

9 / 30

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

A) $group

B) $project

C) $match

D) $sort

10 / 30

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

A) sh.enableSharding()

B) sh.createSharding()

C) sh.startSharding()

D) sh.initiateSharding()

11 / 30

11. How do you query all documents from a collection?

A) db.collection.find()

B) db.collection.getAll()

C) db.collection.findAll()

D) db.collection.query()

12 / 30

12. Which command is used to analyze query performance in MongoDB?

A) db.collection.explain()

B) db.collection.analyze()

C) db.collection.performance()

D) db.collection.profile()

13 / 30

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

A) 60 seconds

B) 30 seconds

C) 10 seconds

D) 120 seconds

14 / 30

14. What does the --query option do in mongoexport?

A) Restores a database

B) Optimizes export speed

C) Imports query results

D) Filters data to be exported

15 / 30

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

A) mongoimport

B) mongodump

C) mongorestore

D) mongoexport

16 / 30

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

A) $exists

B) $field

C) $check

D) $include

17 / 30

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

A) { field: include }

B) { field: 1 }

C) { field: 0 }

D) { field: true }

18 / 30

18. Which aggregation stage can be used to handle Many-to-Many relationships?

A) $project

B) $lookup

C) $match

D) $group

19 / 30

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

A) db.collection.skip()

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

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

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

20 / 30

20. Which of the following is true about MongoDB encryption at rest?

A) It uses RSA encryption

B) It uses SSL/TLS encryption

C) It uses AES-256 encryption

D) It does not support encryption at rest

21 / 30

21. What is the default authentication mechanism in MongoDB?

A) LDAP

B) SCRAM-SHA-1

C) X.509

D) Kerberos

22 / 30

22. Which validation action in MongoDB allows documents that fail validation but logs a warning?

A) skip

B) error

C) ignore

D) warn

23 / 30

23. What is a collection in MongoDB?

A) A group of databases

B) A group of fields

C) A group of documents

D) A group of tables

24 / 30

24. What does the $type operator check?

A) The data type of a field

B) The value of a field

C) If a field exists

D) The size of an array

25 / 30

25. What does the mongostat command display?

A) Backup logs

B) Query performance statistics

C) Memory usage

D) Read/write metrics in real-time

26 / 30

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

A) db.collection.insert()

B) db.collection.add()

C) db.collection.update()

D) db.collection.create()

27 / 30

27. What is the purpose of the auditLog in MongoDB?

A) To log all authentication attempts

B) To log all read operations

C) To log all queries

D) To log all administrative actions

28 / 30

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

A) They are used for compressing data

B) They are atomic at the multi-document level

C) They are not atomic

D) They are atomic at the single-document level

29 / 30

29. Which of the following operations is used to insert a document into a MongoDB collection?

A) db.collection.update()

B) db.collection.find()

C) db.collection.delete()

D) db.collection.insert()

30 / 30

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

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

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

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

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

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