[Solved] Given this code snippet:@RestController public class MyController { @GetMapping("/hello") public String sayHello()... } }What annotation enables Spring Boot to detect this controller automatically? | Spring Boot

Spring Boot - Spring Annotations

Given this code snippet:

@RestController
public class MyController {
  @GetMapping("/hello")
  public String sayHello() { return "Hi"; }
}

What annotation enables Spring Boot to detect this controller automatically?

A@EnableAutoConfiguration

B@Controller

C@SpringBootApplication

D@ComponentScan

Step-by-Step Solution

Solution:

Step 1: Identify how Spring Boot detects components
@SpringBootApplication includes @ComponentScan which detects @RestController classes.
Step 2: Check other annotations
@EnableAutoConfiguration configures beans but does not scan; @ComponentScan is included inside @SpringBootApplication; @Controller is a base annotation but @RestController is used here.
Final Answer:
@SpringBootApplication -> Option C
Quick Check:
Controller detection via @SpringBootApplication [OK]

Quick Trick: Use @SpringBootApplication to enable scanning of controllers [OK]

Common Mistakes:

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