Spring Boot Service Discovery with Eureka Mock Test

Question 1: SERVICE DISCOVERY - Eureka Server Annotation

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

Question 2: SERVICE DISCOVERY - Eureka Client Annotation

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

Question 3: 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 4: 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 5: SERVICE DISCOVERY - Default Port for Eureka Server

By default, on which port does a Eureka Server run?

Question 6: SERVICE DISCOVERY - application.properties (Eureka Client)

What does this configuration achieve?

spring.application.name=order-service
eureka.client.service-url.defaultZone=http://localhost:8761/eureka/

Question 7: SERVICE DISCOVERY - @LoadBalanced in RestTemplate

What does the @LoadBalanced annotation do for a RestTemplate bean in a Eureka-enabled Spring Boot app?

Question 8: SERVICE DISCOVERY - Code Snippet (Inter-Service Call)

What does the following code achieve?

@Autowired
private RestTemplate restTemplate;

public String callPayment() {
    return restTemplate.getForObject("http://payment-service/pay", String.class);
}

Question 9: SERVICE DISCOVERY - Eureka Heartbeat

How do Eureka Clients let the Eureka Server know they are alive?

Question 10: SERVICE DISCOVERY - Circuit Breaker & Eureka

If a Eureka Client goes down, what happens in service-to-service calls?