Drupal 10 Interview Question List

 

General Drupal Knowledge

1. What are the key differences between Drupal 9 and Drupal 10?
2. What are some of the major improvements in Drupal 10’s performance compared to earlier versions?
3. How do you approach a Drupal site migration from an earlier version to Drupal 10?
4. Explain the significance of the Symfony framework in Drupal 10.
5. What is the purpose of the Configuration Management System (CMI) in Drupal? How do you use it in your projects?

Custom Module Development

6. How do you create a custom module in Drupal 10?
7. What’s the best practice for working with Drupal hooks in custom modules? Can you give examples of hooks you commonly use?
8. Explain how services and dependency injection work in Drupal 10 custom module development.
9. How do you create and define custom routes in Drupal 10?
10. What are plugins in Drupal, and how would you create a custom plugin?
11. How do you work with the Drupal 10 Entity API to create or alter content entities?

Theming & Frontend

12. What is the role of Twig in Drupal theming, and how has Twig improved over previous templating engines?
13. How do you override a template file in Drupal 10, and what steps do you follow to debug theming issues?
14. What is the purpose of libraries in Drupal theming, and how do you use them to include CSS and JavaScript files?
15. Can you explain what a Twig extension is and how to create one for a custom project?
16. What’s your approach to implementing responsive design in Drupal 10?

Configuration Management & Deployment

17. How does the Drupal 10 Configuration Management system differ from earlier versions?
18. How do you manage configuration synchronization between different environments (local, dev, production)?
19. What tools do you use for continuous integration and automated deployment in a Drupal project?
20. Can you explain how Drupal's Update API works, and how do you handle database updates?

Caching & Performance

21. What caching mechanisms are available in Drupal 10? How do you optimize a Drupal site’s performance?
22. How would you diagnose and fix slow database queries in a Drupal environment?
23. Explain Drupal’s render cache system and how you manage cache invalidation.
24. How do you use Varnish or Redis to enhance performance in a Drupal project?

Security Best Practices

25. What steps do you take to secure a Drupal 10 site?
26. How do you handle user roles, permissions, and access control in Drupal?
27. Can you explain how you would prevent CSRF, XSS, and SQL Injection attacks in Drupal?
28. How do you keep your Drupal site up to date with security patches?

Webforms & APIs

29. How do you create and manage custom webforms in Drupal 10?
30. Explain how you would integrate third-party APIs with Drupal 10 using REST, JSON
    , or GraphQL.
31. How do you use Drupal's Queue API to handle deferred or asynchronous tasks?

Multilingual & Localization

32. What’s the process for configuring a multilingual Drupal 10 website?
33. How do you manage translations for content entities, config entities, and strings in Drupal 10?

Composer & Dependency Management

34. What role does Composer play in Drupal 10 project management?
35. How do you handle module updates and core updates using Composer in a project?

Testing & Debugging

36. What testing frameworks are integrated with Drupal 10? How do you perform automated testing?
37. Can you walk through how you debug issues in Drupal (e.g., using Xdebug, Drupal’s watchdog log, etc.)?
38. What is PHPUnit, and how do you write unit tests for Drupal 10 custom modules?

Decoupled Drupal

39. What is Decoupled Drupal? Have you worked on a decoupled or headless Drupal project? If so, what technologies did you use?
40. How do you use JSON
    or GraphQL to expose Drupal data to an external frontend?

Leadership & Architecture

41. How do you approach large-scale Drupal projects and ensure high code quality?
42. What’s your process for performing a site audit and identifying bottlenecks or areas for improvement?
43. Have you led a team in a Drupal development project? How do you manage code reviews, team coordination, and project milestones?

Drupal Ecosystem

44. What contributed modules do you commonly use and why?
45. How do you contribute to the Drupal community (e.g., patches, custom modules, etc.)?
46. How do you manage custom code while still leveraging Drupal's contributed modules ecosystem?