The _____ endpoint in OAuth2 is used by the client to obtain an access token.
- /access
- /auth
- /authorize
- /token
In OAuth2, the /token endpoint is used by the client to obtain an access token. The client exchanges its credentials or authorization code for an access token at this endpoint, allowing it to access protected resources on behalf of the user.
You are tasked with optimizing the load balancing strategy used by Ribbon in your Spring Cloud application. How would you approach customizing Ribbon’s behavior to ensure optimal distribution of requests?
- Deploy a dedicated load balancer (e.g., Nginx) in front of your Spring Cloud application to handle load balancing. Configure Ribbon to perform health checks on service instances and route traffic accordingly.
- Implement a custom IRule in Ribbon to define a load balancing strategy tailored to your application's needs. Consider factors like service health, latency, and client performance. Monitor and adjust the strategy based on real-time metrics.
- Use a weighted round-robin strategy for load balancing. Enable server-side load balancing using Spring Cloud Gateway. Implement exponential backoff retries for failed requests. Use the Least Connections strategy to minimize server load.
- Use the default Round Robin strategy as it provides equal distribution of requests. Implement client-side retries for fault tolerance. Configure a static list of servers for each client to maintain control over the request distribution.
Customizing Ribbon's behavior for optimal load balancing involves implementing a custom IRule that considers various factors such as service health, latency, and client performance. Real-time monitoring and adjustments based on metrics ensure the load balancing strategy remains effective. This approach allows you to fine-tune load balancing for your specific application requirements.
Which utility is commonly used in Spring Boot for performing HTTP requests in test scenarios?
- DataSource
- JdbcTemplate
- MockMvc
- RestTemplate
MockMvc is a widely used utility in Spring Boot for performing HTTP requests in test scenarios. It provides a convenient way to write unit tests for Spring MVC controllers and is often used for integration testing in Spring Boot applications.
The _____ file is crucial for defining custom Auto Configuration classes in Spring Boot.
- AutoConfiguration.java
- application.properties
- application.yml
- autoconfigure.properties
The "AutoConfiguration.java" file is crucial for defining custom Auto Configuration classes in Spring Boot. This is where you can define your own auto-configuration classes to customize the behavior of Spring Boot's auto-configuration process. Custom Auto Configuration classes are typically Java classes, and this file plays a central role in configuring them.
When using @PostAuthorize in Spring Security, the access control decision is made after the _____ has been invoked.
- controller
- method
- repository
- service
When using @PostAuthorize in Spring Security, the access control decision is made after the method has been invoked. This annotation allows you to specify additional checks on the return value of the method.
How does Spring Security handle password encoding by default?
- Spring Security does not handle password encoding by default.
- It uses BCrypt password encoding by default.
- It uses MD5 password encoding by default.
- It uses plain text storage for passwords by default.
By default, Spring Security handles password encoding using BCrypt. BCrypt is a secure and commonly used password hashing algorithm that helps protect user passwords. Spring Security's default behavior is to use BCrypt encoding to securely store and verify passwords, enhancing the security of user authentication. The other options are not the default mechanisms used by Spring Security for password encoding.
In Spring Boot, _____ annotation is used to map HTTP POST requests onto specific handler methods.
- @Controller
- @GetMapping
- @PostMapping
- @RequestMapping
In Spring Boot, the @PostMapping annotation is used to map HTTP POST requests onto specific handler methods in a controller class. When you apply this annotation to a method, it tells Spring that this method should be invoked when an HTTP POST request with a matching URL is received. It's a key annotation for handling POST requests in a RESTful API.
Imagine you are developing a Spring Boot application where you need to implement a complex request mapping strategy with custom conditions. How would you achieve this?
- Configuring complex conditions in the application properties.
- Creating a separate utility class for custom mappings.
- Implementing a custom RequestMappingHandlerMapping.
- Using annotations like @RequestMapping for complex mapping.
To implement a complex request mapping strategy with custom conditions, you would typically need to create a custom RequestMappingHandlerMapping. This allows you to define intricate conditions and behaviors for mapping requests to controller methods. Using annotations or configuration properties alone may not provide the level of customization needed for complex mappings. A separate utility class may not integrate seamlessly with Spring Boot's request handling mechanism.
Which annotation is primarily used in Spring Boot to mark the main class of your application?
- @MainClass
- @SpringBootApplication
- @SpringBootClass
- @SpringMain
In Spring Boot, the primary annotation used to mark the main class of your application is @SpringBootApplication. This annotation not only marks the class as the main entry point but also enables various Spring Boot features like auto-configuration, component scanning, and more. It's the starting point for your Spring Boot application.
How can application properties be overridden in Spring Boot for different environments?
- By annotating the @OverrideProperties annotation on the class.
- By creating multiple instances of the SpringApplication class.
- By modifying the application.properties directly.
- Using environment-specific property files.
Application properties in Spring Boot can be overridden for different environments by using environment-specific property files. By naming these files application-{profile}.properties (e.g., application-dev.properties for the 'dev' profile), Spring Boot can load the properties specific to the active profile, allowing you to configure different settings for each environment. This is a key feature for maintaining configurations across various deployment scenarios.