Springboot - The injection point has the following annotations: - @org.springframework.beans.factory.annotation.Autowired(required=true)

I am getting this error: `

***************************
APPLICATION FAILED TO START
***************************
Description:

Field questionDao in com.surbhi.quizapp.service.QuestionService required a bean of type 'com.surbhi.quizapp.dao.QuestionDao' that could not be found.

The injection point has the following annotations:
    - @org.springframework.beans.factory.annotation.Autowired(required=true)

Action:

Consider defining a bean of type 'com.surbhi.quizapp.dao.QuestionDao' in your configuration.

` I have the following file structure and files.

File structure: https://i.sstatic.net/8jSrf.png

QuestionService.java

@Service
public class QuestionService {

  QuestionDao questionDao;

  public QuestionService(QuestionDao questionDao) {
    super();
    this.questionDao = questionDao;
  }

  public ResponseEntity<List<Question>> getAllQuestions() {
    try {
      return new ResponseEntity<>(questionDao.findAll(), HttpStatus.OK);
    } catch (Exception e) {
      e.printStackTrace();
    }
    return new ResponseEntity<>(new ArrayList<>(), HttpStatus.BAD_REQUEST);
  }

  public ResponseEntity<List<Question>> getQuestionsByCategory(
    String category
  ) {
    try {
      return new ResponseEntity<>(
        questionDao.findByCategory(category),
        HttpStatus.OK
      );
    } catch (Exception e) {
      e.printStackTrace();
    }
    return new ResponseEntity<>(new ArrayList<>(), HttpStatus.BAD_REQUEST);
  }

  public ResponseEntity<String> addQuestion(Question question) {
    questionDao.save(question);
    return new ResponseEntity<>("success", HttpStatus.CREATED);
  }
}

QuestionDao.java

@Repository
public interface QuestionDao extends JpaRepository<Question, Integer> {
  List<Question> findByCategory(String category);

  @Query(
    value = "SELECT * FROM question q Where q.category=:category ORDER BY RANDOM() LIMIT :numQ",
    nativeQuery = true
  )
  List<Question> findRandomQuestionsByCategory(String category, int numQ);
}

I have also tried removing @Autowire and creating constructor but then that also didn't work and gave this error

***************************
APPLICATION FAILED TO START
***************************
Description:

Parameter 0 of constructor in com.surbhi.quizapp.service.QuestionService required a bean of type 'com.surbhi.quizapp.dao.QuestionDao' that could not be found.

Action:
Consider defining a bean of type 'com.surbhi.quizapp.dao.QuestionDao' in your configuration.

What should I do, Also added

@SpringBootApplication(scanBasePackages={ "com.surbhi.quizapp.controller", "com.surbhi.quizapp.dao","com.surbhi.quizapp.model","com.surbhi.quizapp.service"})

in main, but that doesn't work either.

Used @ComponentScan, doesn't work

Main class file:

@SpringBootApplication

@ComponentScan("com.surbhi.quizapp.dao")

public class QuizappApplication {

    public static void main(String[] args) {
        SpringApplication.run(QuizappApplication.class, args);
    }

}

Looking at the package photo you uploaded, it appears that there are two QuizappApplication classes. (com.surbhi.quizapp, com.surbhi.quizapp.service)

Will the same problem occur if I remove the QuizappApplication class that exists in the com.surbhi.quizapp.service package and write it as follows?

@SpringBootApplication
public class QuizappApplication {

    public static void main(String[] args) {
        SpringApplication.run(QuizappApplication.class, args);
    }

}

Additionally, the @Repository annotation is not required on the QuestionDao interface.