Which Spring Boot feature is commonly used to automate the database schema creation and update process?
- Spring Data JPA
- Spring Database Migrations
- Spring Boot Auto-Config
- Spring Hibernate
Spring Data JPA is commonly used in Spring Boot applications to automate the database schema creation and update process. It provides a high-level, object-oriented interface for interacting with databases and generates SQL statements for schema changes automatically. While the other options may interact with databases, they are not specifically designed for automating schema changes in the same way Spring Data JPA does.
Which of the following is NOT a benefit of implementing caching in a Spring Boot application?
- Reduced database load.
- Faster response times.
- Increased application complexity.
- Improved scalability.
Implementing caching in a Spring Boot application brings several benefits, including reduced database load, faster response times, and improved scalability. However, increased application complexity is not a benefit; it's a potential drawback. Caching adds some complexity to the application logic and requires careful management to ensure data consistency and cache invalidation. The other options reflect actual benefits of caching.
How can you configure an array of values using the YAML configuration file in Spring Boot?
- By using square brackets [].
- By separating values with commas.
- By using angle brackets < >.
- By enclosing values in curly braces { }.
In a YAML configuration file in Spring Boot, you can configure an array of values by using square brackets []. This format allows you to define a list of items. Each item in the list can be a separate value or a key-value pair. The other options are not the correct syntax for defining arrays in YAML configuration files.
To test security configurations in Spring Boot applications, you should consider using _____.
- @SecurityTest
- @SpringBootTest
- @TestSecurity
- @WebMvcTest
To test security configurations in Spring Boot applications, you should consider using @SpringBootTest. This annotation allows you to load the complete application context and test the security configurations effectively.
In a complex Spring Boot application with numerous controllers and a global exception handler, a new requirement mandates the implementation of controller-specific exception handlers. How would you approach this requirement to provide custom error responses from individual controllers while maintaining the functionality of the global exception handler?
- Implement individual @ExceptionHandler methods in each controller for controller-specific exception handling.
- Remove the global exception handler to avoid conflicts with controller-specific handlers.
- Use a single global @ExceptionHandler for all controllers to ensure consistent error handling.
- Implement a custom servlet filter to handle exceptions at the controller level.
To address the requirement of providing custom error responses from individual controllers while maintaining the functionality of the global exception handler in a complex Spring Boot application, you can implement individual @ExceptionHandler methods in each controller. This approach allows for controller-specific exception handling while still benefiting from the global exception handler for unhandled cases. The other options may not meet the requirement effectively.
Reactive Streams in Spring Boot offer _____ to handle the flow of data between the producer and consumer.
- A blocking approach
- A sequential approach
- A synchronous approach
- An asynchronous approach
Reactive Streams in Spring Boot offer an "asynchronous approach" to handle the flow of data between the producer and consumer. Reactive Streams are designed for asynchronous, non-blocking processing of data and provide a standardized way to deal with data streams, making it easier to handle data in a reactive and efficient manner.
When testing with @WebMvcTest, what considerations should be made regarding the security configurations of the application?
- Security configurations are automatically disabled in @WebMvcTest.
- Security settings from the main application apply to @WebMvcTest.
- You must explicitly configure security settings in the @WebMvcTest annotation.
- Security settings can be configured in a separate test.properties file.
When using @WebMvcTest, the security configurations from the main application apply by default. You should be aware that the security settings of the application being tested will be active, and you may need to adjust your tests accordingly. Options 1, 3, and 4 do not accurately describe how security configurations work in @WebMvcTest.
In Spring Security, to apply method security, one needs to enable it using the _____ annotation on a configuration class.
- @EnableGlobalMethodSecurity
- @EnableMethodProtection
- @MethodSecurity
- @SecuredMethod
To enable method-level security in Spring Security, you need to use the @EnableGlobalMethodSecurity annotation on a configuration class. It's used to activate annotations like @Secured, @PreAuthorize, etc., for method-level security.
To define a global default exception handler for unhandled exceptions in Spring Boot, you can use a _____ with the highest precedence.
- @ControllerAdvice
- @ExceptionHandler
- @ExceptionHandlerAdvice
- @ResponseStatus
In Spring Boot, to define a global default exception handler for unhandled exceptions, you use the @ControllerAdvice annotation. This annotation allows you to define a class that can be applied globally to handle exceptions across all controllers. It provides a way to centralize exception handling in your application.
How can you change the default port number of the embedded web server in a Spring Boot application?
- By adding a @ServerPort annotation on the main application class.
- By configuring it in the embedded web server's constructor.
- By creating a custom embedded web server configuration class and setting the port there.
- By modifying the server.port property in the application.properties file.
You can change the default port number of the embedded web server in a Spring Boot application by modifying the server.port property in the application.properties file. This property allows you to specify the desired port number. Spring Boot automatically configures the embedded web server (e.g., Tomcat) based on this property, making it a straightforward way to control the server's port.