You are developing a Spring Boot application with a large team. How would you manage and segregate configuration properties for different modules?
- By embedding configuration properties directly in the source code to ensure they are tightly coupled with their respective modules.
- By relying on a centralized configuration service that manages properties for all modules in a monolithic manner.
- By storing all configuration properties in a single file and maintaining a shared spreadsheet for tracking properties used by different modules.
- By using Spring Boot's external configuration mechanisms like application.properties or application.yml files, and organizing them into separate folders or packages for each module.
When developing a Spring Boot application with a large team, it's best to use Spring Boot's external configuration mechanisms like application.properties or application.yml files. These can be organized into separate folders or packages for each module, making it easier to manage and segregate configuration properties. Storing all properties in a single file or embedding them in the source code is not a scalable or maintainable approach. A centralized configuration service can be complex and less flexible for individual modules.
What does the @ConditionalOnClass annotation do in the context of Auto Configuration?
- It defines a required class for Auto Configuration.
- It disables Auto Configuration for a specific class.
- It indicates a conditional bean creation.
- It specifies the class to be ignored.
The @ConditionalOnClass annotation, when used in the context of Auto Configuration, defines a required class for Auto Configuration to be enabled. If the specified class is present on the classpath, the associated configuration will be applied. This allows developers to conditionally configure components based on the availability of certain classes. It does not ignore, disable, or indicate conditional bean creation.
In Spring Boot, the _____ attribute of the @ExceptionHandler annotation allows you to define the types of exceptions the method will handle.
- errorTypes
- exceptions
- handled
- value
In Spring Boot, the value attribute of the @ExceptionHandler annotation is used to specify the types of exceptions that a particular method should handle. By specifying the exception types, you can ensure that the method is invoked only when those specific exceptions are thrown, allowing for more fine-grained exception handling in your application.
In Mockito, the _____ method can be used to stub a return value for a method call.
- mock
- spy
- verify
- when
In Mockito, the when method is used to stub a return value for a method call. This allows you to define the behavior of a mocked object when a specific method is called during testing.
In Spring Boot, which annotation is used to denote that a test class should load only specific parts of the application context for Web tests?
- @ContextConfiguration
- @SpringBootTest
- @WebAppConfiguration
- @WebMvcTest
The @WebMvcTest annotation is used to load only the Web layer of the Spring application context, making it suitable for testing controllers and related components.
How can you conditionally exclude specific Auto Configurations in a Spring Boot application?
- Using the spring.autoconfigure.exclude property in application.properties or application.yml.
- By annotating the class with @ExcludeAutoConfiguration and specifying the classes to exclude.
- By removing the Auto Configuration JARs from the classpath.
- By using a custom excludeAutoConfiguration method in the main application class.
To conditionally exclude specific Auto Configurations, you can use the spring.autoconfigure.exclude property in your application.properties or application.yml file. This property allows you to specify the fully qualified names of the Auto Configuration classes you want to exclude. The other options do not provide a direct way to conditionally exclude Auto Configurations.
To perform integration testing in Spring Boot, the _____ annotation is used to enable full application context loading.
- @ContextConfiguration
- @IntegrationTest
- @RunWith(SpringRunner.class)
- @SpringBootTest
In Spring Boot, to perform integration testing and enable full application context loading, you use the @SpringBootTest annotation. This annotation loads the entire Spring application context, making it suitable for integration testing scenarios.
To customize the response body of a global exception handler method in Spring Boot, the method should return an object of type _____.
- CustomResponse
- ExceptionResponse
- ResponseEntity
- ResponseObject
To customize the response body of a global exception handler method in Spring Boot, the method should return an object of type ResponseEntity. This allows you to create a custom response with specific status codes, headers, and response bodies when an exception is caught globally. It provides flexibility in crafting error responses tailored to your application's needs.
You need to optimize a Spring Boot application for faster startup times. What strategies and configurations would you employ for this optimization?
- Minimizing the number of auto-configured beans, using lazy initialization for non-essential components, and optimizing classpath scanning.
- Increasing the number of auto-configured beans to pre-warm the application, enabling verbose logging for debugging, and adding more third-party dependencies.
- Reducing the amount of available memory for the application, disabling caching, and using blocking I/O for database operations.
- Increasing the number of threads in the application thread pool, even if it leads to contention.
Optimizing a Spring Boot application for faster startup times involves strategies like minimizing the number of auto-configured beans, using lazy initialization for non-essential components, and optimizing classpath scanning. These approaches reduce the initial overhead and improve startup times. The other options, such as increasing auto-configured beans or increasing thread pool size without consideration, can lead to performance issues or longer startup times.
To define hierarchical properties in a YAML configuration file in Spring Boot, you can use _____.
- YAML anchors
- YAML hierarchy
- YAML inheritance
- YAML nesting
In Spring Boot, you can define hierarchical properties in a YAML configuration file using YAML nesting. YAML allows you to structure your configuration data hierarchically, making it easy to organize and manage complex configuration settings for your application. This helps in maintaining a clean and readable configuration.