How can you specify that a bean should be injected with a specific qualifier when there are multiple candidates?

You can specify that a bean should be injected with a specific qualifier when there are multiple candidates by using the @Qualifier annotation in Spring. This annotation helps Spring identify which candidate bean should be injected into the target. The other options, such as @Inject and @Autowired, are used for dependency injection but do not directly deal with qualifier-based injection. The application.properties file is typically used for configuration and not for specifying bean injection.