Spring Cloud Test 1

    Question 1: SERVICE DISCOVERY - Eureka Server Annotation

    Which annotation enables a Spring Boot application to act as a Eureka Server?

    Question 2: API GATEWAY - Purpose of Spring Cloud Gateway

    What is the primary role of Spring Cloud Gateway in a microservices architecture?

    Question 3: CENTRALIZED CONFIG - Purpose of Spring Cloud Config

    What is the main role of Spring Cloud Config Server in a microservices setup?

    Question 4: CIRCUIT BREAKEER - Purpose of Circuit Breaker

    What is the main goal of using a Circuit Breaker in a microservice?

    Question 5: DISTRIBUTED TRACING - Purpose of Distributed Tracing

    What is the primary purpose of distributed tracing in microservices?

    Question 6: SERVICE DISCOVERY - Eureka Client Annotation

    Which annotation registers a Spring Boot application as a Eureka Client?

    Question 7: API GATEWAY - Code Snippet (Basic Route)

    What does this configuration achieve?

    @Bean
public RouteLocator routes(RouteLocatorBuilder builder) {
    return builder.routes()
        .route("order_route", r -> r.path("/orders/**")
            .uri("http://localhost:8081"))
        .build();
}

    Question 8: CENTRALIZED CONFIG - Code Snippet (Enable Config Server)

    What does the following class represent?

    @SpringBootApplication
@EnableConfigServer
public class ConfigServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(ConfigServerApplication.class, args);
    }
}

    Question 9: CIRCUIT BREAKEER - States of Circuit Breaker

    Which is not a valid state of Resilience4j Circuit Breaker?

    Question 10: DISTRIBUTED TRACING - Spring Cloud Sleuth Role

    What does Spring Cloud Sleuth do in a Spring Boot microservice?

    Question 11: SERVICE DISCOVERY - Code Snippet (Eureka Server Setup)

    What role does this application play?

    @SpringBootApplication
@EnableEurekaServer
public class DiscoveryServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(DiscoveryServerApplication.class, args);
    }
}

    Question 12: API GATEWAY - Using Service Discovery

    How do we enable service discovery–based routing in Spring Cloud Gateway with Eureka?

    Question 13: CENTRALIZED CONFIG - Config Server Backend

    By default, where does Spring Cloud Config Server fetch configurations from?

    Question 14: CIRCUIT BREAKEER - Code Snippet (Annotation Usage)

    What does this method do?

    @CircuitBreaker(name = "orderService", fallbackMethod = "orderFallback")
public String placeOrder() {
    return restTemplate.getForObject("http://payment-service/pay", String.class);
}

    Question 15: DISTRIBUTED TRACING - Code Snippet (Enable Sleuth and Zipkin)

    What is achieved by this configuration in application.yml?

    spring:
  zipkin:
    base-url: http://localhost:9411
    enabled: true
  sleuth:
    sampler:
      probability: 1.0

    Question 16: SERVICE DISCOVERY - Code Snippet (Eureka Client Setup)

    What is configured by the following snippet?

    @SpringBootApplication
@EnableEurekaClient
public class PaymentServiceApplication {
    public static void main(String[] args) {
        SpringApplication.run(PaymentServiceApplication.class, args);
    }
}

    Question 17: API GATEWAY - Code Snippet (Discovery Routing)

    What does this route config do?

    spring:
  cloud:
    gateway:
      routes:
        - id: payment_route
          uri: lb://payment-service
          predicates:
            - Path=/payments/**

    Question 18: CENTRALIZED CONFIG - Code Snippet (Config Server Properties)

    What does this application.yml config achieve?

    spring:
  cloud:
    config:
      server:
        git:
          uri: https://github.com/myorg/config-repo

    Question 19: RESILIENCE - Fallback Method Rule

    In Resilience4j, what must be true for a fallback method?

    Question 20: DISTRIBUTED TRACING - Span vs Trace

    Which statement is correct?