Interview Prep
Spring Boot, Spring MVC, dependency injection, request lifecycle, REST APIs, security, observability, and production backend concepts.
Showing 7 of 7 questions
A request enters the embedded servlet container, passes through filters, reaches DispatcherServlet, gets mapped to a controller method, calls application logic, and returns a response.
Spring creates and manages objects called beans, figures out what each bean depends on, and injects those dependencies when it creates the bean.
Spring Boot startup involves creating the application context, scanning beans, processing auto-configuration, wiring dependencies, initializing the embedded server, and preparing the application to serve requests.
Spring MVC uses DispatcherServlet as the central front controller. It receives HTTP requests, asks HandlerMapping which controller method should handle them, uses HandlerAdapter to invoke that method, and then writes the response.
Understand how JWT (JSON Web Tokens) authentication works in Spring Boot, how bearer tokens are validated, and how claims become authorities.
Learn how Spring caching works with @EnableCaching, @Cacheable, @CacheEvict, @CachePut, cache keys, and distributed cache concerns.
A Spring Boot OAuth2 Resource Server is an API that protects endpoints by validating bearer tokens, usually JWTs, and converting token claims into permissions.