How can you prioritize different @ControllerAdvice classes in Spring Boot?

  • By setting the priority attribute in each @ControllerAdvice class.
  • By using the @Order annotation on each @ControllerAdvice class.
  • By specifying the order in the application.properties file.
  • By organizing @ControllerAdvice classes in different packages.
In Spring Boot, you can prioritize different @ControllerAdvice classes by using the @Order annotation on each class. This allows you to control the order in which these classes are applied when handling exceptions. The other options don't provide a direct way to prioritize @ControllerAdvice classes.

To include additional configuration files in a Spring Boot project, the _____ property can be used.

  • boot.config.files
  • config.additional
  • spring.config.name
  • spring.extra.config
In Spring Boot, you can include additional configuration files using the spring.config.name property. This property allows you to specify the base name of the configuration files to be loaded. The default value is "application," so if you have a custom configuration file like "myapp.properties," you can specify it as spring.config.name=myapp in your application.properties or application.yml file.

When creating a custom error response in Spring Boot, the _____ method of the ResponseEntity class can be used to set the HTTP status code of the response.

  • setHttpStatus
  • status
  • statusCode
  • statusSet
When creating a custom error response in Spring Boot, you can use the status method of the ResponseEntity class to set the HTTP status code of the response. This allows you to return specific HTTP status codes along with custom error messages, providing clear information to clients about the nature of the error that occurred.

How do you bind the HTTP request body to the parameters of a method in a Spring Boot application?

  • Using the @RequestBody annotation.
  • By defining a custom method in Spring Boot.
  • By using the @RequestParam annotation.
  • Through the @PathVar annotation.
In a Spring Boot application, you bind the HTTP request body to the parameters of a method using the @RequestBody annotation. This annotation tells Spring to convert the incoming request body to the corresponding Java object automatically. It's commonly used for processing JSON or XML data sent in the request body. The other options are not typically used for this purpose.

How can you create a custom query method in a Spring Data JPA repository?

  • By defining a method in the repository interface with a name that follows specific conventions.
  • By using the @Query annotation to specify the JPQL query.
  • By extending the JpaRepository interface and inheriting built-in methods.
  • By using the @CustomQuery annotation to define the custom query.
In Spring Data JPA, custom query methods are created by defining a method in the repository interface with a name that follows specific conventions. Spring Data JPA analyzes the method name and generates the appropriate SQL query, making it a powerful and convenient way to create custom queries without writing SQL explicitly. The other options, while valid in certain contexts, do not describe the typical way to create custom query methods in Spring Data JPA.

In what scenario would you prefer to use @Inject over @Autowired for dependency injection?

  • When using Java EE components or environments.
  • When you want to inject dependencies by name.
  • When you need to inject dependencies conditionally.
  • When working with Spring Boot applications.
You would prefer to use @Inject over @Autowired for dependency injection when using Java EE components or environments. @Inject is a standard Java EE annotation for dependency injection, while @Autowired is more specific to Spring. In a Java EE context, it's recommended to use @Inject for better portability. The other options may not be the primary reasons for choosing @Inject over @Autowired.

What is the primary build tool used for Spring Boot projects by default when generating a project using start.spring.io?

  • Gradle
  • Ant
  • Make
  • Maven
Maven is the primary build tool used for Spring Boot projects by default when generating a project using start.spring.io. Spring Boot favors Maven as the build tool due to its wide adoption and robust capabilities for managing dependencies and building projects. Other build tools like Gradle can be used but are not the default choice.

Which of the following annotations can be used to customize the response body in a Spring Boot application?

  • @RequestBody
  • @RequestMapping
  • @ResponseBody
  • @RestController
The @ResponseBody annotation in Spring Boot is used to customize the response body of a controller method. It allows you to return data in various formats, such as JSON, XML, or plain text, depending on the media type specified. This annotation is commonly used in RESTful API development to control the format of the response data.

You are working on a Spring Boot application with multiple service components interacting with each other. How would you isolate and test a single service component ensuring that the interactions with other components are not affecting the test results?

  • Use integration testing to test the entire application stack.
  • Use mock objects or frameworks like Mockito to mock the interactions with other components.
  • Disable other service components temporarily during testing.
  • Rewrite the service component to be independent of others.
In this scenario, you should use mock objects or frameworks like Mockito to simulate the interactions with other components. This allows you to isolate the component being tested and control its behavior during testing without affecting other components.

For advanced scenarios in service discovery, such as region isolation, the Spring Cloud component ____ can be configured along with Eureka.

  • Feign
  • Hystrix
  • Ribbon
  • Zuul
For advanced scenarios in service discovery, such as region isolation, the Spring Cloud component Ribbon can be configured along with Eureka. Ribbon is a client-side load balancer that works seamlessly with Eureka for client-side load balancing. It allows you to customize load-balancing strategies and apply them to different scenarios, such as region-based routing or weighted load balancing, by configuring properties and policies.