Spring Security - Level II

Practice 20 Spring Security - Level II interview questions with detailed answers. Part of the Spring Security track on Java Interview Hub.

• How would you secure REST API? Please share all methods step by step.
• What is SLF4J logging?
• Explain the working of OAuth2 Authentication.
• What details are present in a JWT token?
• What are the options for securing a REST API in Spring Boot?
• How can JWT (JSON Web Token) be integrated into Spring Boot for API security?
• You are tasked with designing a secure REST API for a banking application. What security practices would you implement in Spring Boot?
• Explain how Spring Security integrates with OAuth2 for authentication and authorization.
• How do you handle session management in Spring Boot in the context of security?
• How can you implement authentication and authorization in Spring Boot?
• Can you explain how to use method-level security in Spring Boot?
• Can you describe an approach to implement security in service-to-service communication?
• What are the differences between method security and URL security in Spring Security?
• If you need to secure REST endpoints based on user roles, what Spring Security configurations would you use?
• What are the core classes to implement Spring Security? Is this any how different while using with Spring MVC or with Spring Boot? OR Is all Maven/Gradle dependency needs to add while using spring boot or is there any dedicated starter for Spring Security?
• You are developing a web application where users can have different roles (e.g., ADMIN, USER). How would you implement role-based access control using Spring Security to ensure that only users with the ADMIN role can access certain endpoints?
• Your application requires stateless authentication for RESTful services. How would you implement JSON Web Token (JWT) authentication using Spring Security? Describe the flow from user login to accessing protected resources.
• You are building a web application that requires secure forms to prevent Cross-Site Request Forgery (CSRF) attacks. How would you configure CSRF protection in Spring Security, and what additional measures would you take to ensure form security?
• You have a service layer in your application that contains methods that should only be accessed by certain roles. How would you implement method-level security using Spring Security annotations to restrict access to these methods based on user roles?
• In your application, you need to securely store user passwords. What approach would you take to implement password encoding in Spring Security? Discuss the choice of encoding algorithm and how to verify passwords during authentication.