Spring Security

Basic Authentication and Authorization:

1. You need to secure a REST API with basic authentication. How would you configure it in Spring Security?
2. A user needs to be authenticated against a custom user store instead of the default in-memory one. How do you implement this in Spring Security?
3. You need to restrict access to certain endpoints based on user roles. How would you configure this?
4. You want to implement form-based authentication with a custom login page. How do you do it?
5. You need to support both basic and form-based authentication for different endpoints. How would you configure this in Spring Security?
6. You need to allow unauthenticated access to certain public endpoints. How do you achieve this?
7. A specific endpoint should only be accessible by users with multiple roles. How would you configure this?
8. You want to display a custom access denied page for unauthorized users. How do you configure it in Spring Security?
9. You need to implement remember-me functionality in your application. How would you configure this?
10. The login process should be logged for audit purposes. How would you implement this in Spring Security?

Advanced Authentication Mechanisms:

11. You need to integrate LDAP-based authentication into your Spring Security application. How would you configure it?
12. How would you configure Spring Security to use OAuth2 for authentication with a third-party provider like Google?
13. You need to implement multi-factor authentication (MFA) in your Spring Security application. How would you go about this?
14. You have a custom token-based authentication mechanism. How do you integrate it with Spring Security?
15. You need to implement SSO (Single Sign-On) in a Spring Boot application. How do you achieve this using Spring Security?
16. How would you configure Spring Security to use JWT tokens for stateless authentication?
17. You need to authenticate users based on their IP address. How do you implement this in Spring Security?
18. You need to support SAML-based authentication in your Spring Security application. How would you configure it?
19. How would you implement custom authentication filters in Spring Security?
20. You need to handle multiple authentication providers (e.g., LDAP and database). How would you configure this?

Role-Based Access Control (RBAC):

21. How would you assign roles dynamically to users based on specific conditions during authentication?
22. A user’s roles need to be loaded from a database. How would you implement this in Spring Security?
23. You need to implement hierarchical roles (e.g., ADMIN > MANAGER > USER). How would you configure this in Spring Security?
24. How would you implement method-level security to restrict access to specific methods based on roles?
25. You need to implement role-based access control with custom roles not present in the user database. How would you achieve this?
26. How do you configure access control lists (ACLs) for securing domain objects in Spring Security?
27. You need to implement a role-based menu system where the menu options vary based on user roles. How would you implement this?
28. How would you implement role-based authorization checks at the controller level?
29. A user’s role needs to be updated dynamically during a session. How would you handle this in Spring Security?
30. How do you prevent users with certain roles from accessing specific URLs in a Spring Boot application?

Security Context and Session Management:

31. You need to manage user sessions to ensure only one active session per user. How would you configure this in Spring Security?
32. How would you implement session timeout handling in a Spring Security application?
33. You need to invalidate a user’s session programmatically. How would you achieve this in Spring Security?
34. You want to track the number of active sessions for a user. How would you implement this in Spring Security?
35. How would you configure Spring Security to store sessions in a distributed environment (e.g., Redis)?
36. You need to maintain a user’s authentication state across multiple applications. How would you implement this?
37. How would you configure Spring Security to handle session fixation attacks?
38. You need to programmatically access the current user’s authentication information. How do you achieve this?
39. How would you implement a custom session management strategy for a Spring Boot application?
40. You need to log out a user from all active sessions when they change their password. How would you implement this?

Custom Authentication and Authorization:

41. How would you implement a custom authentication provider to validate users against an external service?
42. You need to create a custom UserDetailsService to load user-specific data. How would you implement it?
43. How would you customize the authentication failure handling process in Spring Security?
44. You need to allow users to authenticate using a third-party API. How would you integrate this with Spring Security?
45. How would you implement custom access decision logic in Spring Security?
46. You need to create a custom GrantedAuthority implementation for dynamic permission assignment. How would you do this?
47. How would you customize the behavior of the SecurityContext in Spring Security?
48. You need to perform a security check on a request parameter before allowing access to a resource. How do you implement this?
49. How would you implement a custom logout handler in Spring Security?
50. You want to restrict access to certain endpoints based on dynamic conditions, such as time of day. How would you implement this?

Spring Security in Microservices:

51. You need to implement token-based authentication across multiple microservices. How would you achieve this?
52. How would you secure communication between microservices in a Spring Boot application?
53. You need to propagate user security context across microservices. How do you implement this?
54. How would you handle centralized authentication for multiple microservices using Spring Security?
55. You need to implement role-based access control across microservices. How would you manage this?
56. How do you secure service-to-service communication in a microservice architecture using Spring Security?
57. You need to implement a centralized authorization service for microservices. How would you configure this?
58. How would you handle authentication and authorization in a reactive microservice using Spring Security?
59. You need to implement JWT-based security for stateless microservices. How do you achieve this?
60. How would you implement API Gateway security in a microservice architecture using Spring Security?

Security Testing and Auditing:

61. How would you test a Spring Security configuration to ensure proper access controls?
62. You need to write unit tests for custom security filters. How would you do it?
63. How would you test method-level security in Spring Boot?
64. You need to audit login attempts and failed login events. How would you implement this in Spring Security?
65. How would you test a Spring Security configuration for various authentication scenarios?
66. You need to create a test suite to validate security roles and permissions. How would you set it up?
67. How would you ensure that your Spring Security configuration is compliant with security best practices?
68. You need to log and monitor security-related events. How would you configure this in Spring Security?
69. How would you implement security vulnerability testing for a Spring Boot application?
70. You need to simulate a CSRF attack in your tests. How would you configure this scenario?

Security for Specific Use Cases:

71. How would you implement CSRF protection in a Spring Boot application with REST APIs?
72. You need to secure WebSocket communication in a Spring Boot application. How would you configure this?
73. How would you implement custom CORS configuration for specific endpoints in Spring Security?
74. You need to secure file uploads in a Spring Boot application. How would you achieve this?
75. How would you implement security headers (e.g., X-Content-Type-Options) in a Spring Boot application?
76. You need to restrict file download access based on user roles. How would you implement this in Spring Security?
77. How would you secure a multi-tenant application where different tenants have different security requirements?
78. You need to handle password reset functionality securely. How would you implement this in Spring Security?
79. How would you implement encryption for sensitive data in a Spring Security application?
80. You need to enforce strong password policies for users. How would you implement this in Spring Security?

Integration with Other Frameworks and Technologies:

81. How would you integrate Spring Security with Thymeleaf for secure view rendering?
82. You need to secure a Spring Boot application that uses GraphQL. How would you implement security?
83. How would you configure Spring Security to work with Spring Data REST?
84. You need to integrate Spring Security with a custom front-end framework (e.g., Angular, React). How do you handle authentication?
85. How would you secure RESTful APIs in a Spring Boot application with OAuth2?
86. You need to implement role-based access control in a Spring Boot application using Keycloak. How would you configure it?
87. How would you secure a RESTful web service that communicates with an external OAuth2 provider?
88. You need to integrate Spring Security with Apache Shiro for a specific use case. How would you handle this?
89. How would you implement JWT authentication in a Spring Boot application with a custom front-end?
90. You need to secure a legacy application using Spring Security without altering much of the existing codebase. How do you approach this?

Security Best Practices and Optimization:

91. You need to ensure your application is resistant to common security vulnerabilities like XSS and SQL Injection. How would you implement this in Spring Security?
92. How would you optimize the performance of a Spring Security-enabled application under high load?
93. You need to implement secure logging practices in a Spring Boot application. How do you achieve this?
94. How would you implement HTTPS enforcement in a Spring Boot application?
95. You need to secure a Spring Boot application against brute force attacks. How would you implement rate limiting?
96. How would you ensure that your Spring Security configuration is scalable for a high-traffic application?
97. You need to implement content security policies (CSP) in your Spring Boot application. How would you configure this?
98. How would you secure sensitive endpoints that are accessible via APIs in a mobile application?
99. You need to implement security measures to protect against session hijacking. How would you handle this in Spring Security?
100. You need to ensure that user data is protected at rest and in transit. How would you implement this in Spring Security?