Spring Boot Quiz - Is a @RestController singleton by default?

Question

A. Yes, one per request

B. Yes, it’s a singleton

C. No, it’s prototype scoped

D. Depends on the HTTP method

Answer

B. Yes, it's a singleton

Spring Controller Lifecycle

Spring controllers annotated with @RestController (or @Controller) are singleton beans by default. This means:

• One instance of the controller is created per application context

• All requests