Here are 38 potential questions that might be asked of a MongoDB developer during a job interview:

1. What is MongoDB and why is it used?
2. How do you install and set up a MongoDB instance?
3. How do you create a MongoDB database and collection?
4. How do you insert documents into a MongoDB collection?
5. How do you query documents in a MongoDB collection?
6. How do you update documents in a MongoDB collection?
7. How do you delete documents from a MongoDB collection?
8. How do you use the MongoDB Aggregation Framework to perform data processing and analysis?
9. How do you use the MongoDB MapReduce function to perform data processing and analysis?
10. How do you use the MongoDB Text Search feature to perform full-text search on string content?
11. How do you use the MongoDB Geospatial Indexes and Queries feature to work with location data?
12. How do you use the MongoDB GridFS feature to store and retrieve large files?
13. How do you use the MongoDB Schema Validation feature to enforce data consistency?
14. How do you use the MongoDB Transactions feature to ensure data integrity?
15. How do you use the MongoDB Change Streams feature to track changes to data in a collection?
16. How do you use the MongoDB Replication feature to improve data availability and durability?
17. How do you use the MongoDB Sharding feature to scale out a database across multiple servers?
18. How do you use the MongoDB Backup and Recovery feature to protect against data loss?
19. How do you use the MongoDB Management Service (MMS) to monitor and manage a MongoDB deployment?
20. How do you use the MongoDB Compass tool to visualize and interact with a MongoDB database?
21. How do you use the MongoDB Shell to interact with a MongoDB instance?
22. How do you use the MongoDB Driver to connect to a MongoDB instance from a programming language?
23. How do you use MongoDB indices to improve query performance?
24. How do you design a MongoDB schema to store and access data efficiently?
25. How do you troubleshoot performance issues in a MongoDB deployment?
26. How do you secure a MongoDB deployment?
27. How do you monitor a MongoDB deployment for performance and availability?
28. How do you migrate data to and from a MongoDB instance?
29. How do you use the MongoDB Aggregation Framework to perform data processing and analysis on large datasets?
30. How do you use the MongoDB MapReduce function to perform data processing and analysis on large datasets?
31. How do you use the MongoDB Text Search feature to perform full-text search on large collections of string data?
32. How do you use the MongoDB Geospatial Indexes and Queries feature to work with large datasets of location data?
33. How do you use the MongoDB GridFS feature to store and retrieve large files efficiently?
34. How do you use the MongoDB Schema Validation feature to enforce data consistency in large datasets?
35. How do you use the MongoDB Transactions feature to ensure data integrity in large datasets?
36. How do you use the MongoDB Change Streams feature to track changes to large datasets?
37. How do you use the MongoDB Replication feature to improve data availability and durability in large datasets?
38. How do you use the MongoDB Sharding feature to scale out a large database across multiple servers?