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.
What components are typically scanned and loaded when a test is annotated with @DataJpaTest in Spring Boot?
- Data access components such as repositories and entity classes.
- Logging components for debugging.
- Security components for authentication and authorization.
- Web components like controllers and views.
The @DataJpaTest annotation is used for testing the data access layer of a Spring Boot application. It typically scans and loads data access components such as repositories and entity classes, enabling database-related testing.
How can a custom auto-configuration be created in Spring Boot?
- By defining a class annotated with @SpringBootApplication.
- By using the @EnableAutoConfiguration annotation.
- By creating a class with @Configuration and @ConditionalOnClass annotations.
- By specifying properties in the application.properties file.
In Spring Boot, you can create custom auto-configurations by defining a class with the @Configuration annotation and using the @ConditionalOnClass annotation to conditionally enable the configuration based on the presence of specific classes. This allows you to control when your custom auto-configuration should be applied. The other options do not directly relate to creating custom auto-configurations in Spring Boot.
To handle exceptions that occur during form binding, you can use the _____ method of the DataBinder class in Spring Boot.
- setExceptionHandler
- setBindingExceptionHandler
- setFormExceptionHandler
- setValidationExceptionHandler
To handle exceptions during form binding in Spring Boot, you can use the setBindingExceptionHandler method of the DataBinder class. This method allows you to set an exception handler specifically for form binding. The other options do not correspond to valid methods for handling exceptions during form binding in Spring Boot.
In Spring Boot, to exclude specific auto-configuration classes from being applied, the _____ property can be used in the application properties file.
- spring.autoconfig.exclude
- spring.autoconfigure.exclude
- spring.config.exclude
- spring.exclude.autoconfig
In Spring Boot, you can exclude specific auto-configuration classes from being applied by using the "spring.autoconfigure.exclude" property in the application properties file. This is helpful when you want to customize your application's configuration and prevent certain auto-configurations from being applied.
The JVM option ________ can be optimized to allocate more memory to a Spring Boot application.
- -Xms
- -Xss
- -Xmx
- -Xdebug
The JVM option "-Xmx" can be optimized to allocate more memory to a Spring Boot application. The "-Xmx" option specifies the maximum heap size that the JVM can use. By increasing this value, you allocate more memory to your application, which can help prevent out-of-memory errors and improve performance for memory-intensive Spring Boot applications.
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.