Spring Cloud Cheat Sheet 2026

The 30 highest-yield Spring Cloud facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. How should Spring Cloud professionals apply research findings to practice? → Critically evaluate applicability, adapt to context, and monitor outcomes
2. How does continuous improvement apply to Spring Cloud quality management? → It involves ongoing incremental enhancements to processes based on data and feedback
3. What exactly is spring? → Spring is an open source development framework for enterprise Java.
4. What are the three states a circuit breaker cycles through in the circuit breaker pattern? → Closed, Open, Half-Open
5. Which Spring Cloud Gateway feature allows defining routes programmatically in Java instead of YAML configuration? → Fluent Java DSL using RouteLocatorBuilder
6. What exactly is an aspect? → A module which has a set of APIs providing cross-cutting requirements
7. How do Spring Cloud professionals evaluate research quality? → By assessing methodology, sample size, peer review status, and relevance to practice
8. Which Spring Cloud project provides service discovery support using HashiCorp Consul? → Spring Cloud Consul
9. In Spring, what are the IoC containers? → BeanFactory, ApplicationContext
10. In Spring Cloud Gateway, which built-in filter adds a request rate limiting capability to protect downstream services? → RequestRateLimiter GatewayFilter
11. How has digital technology transformed Spring Cloud practice? → It has enhanced data collection, analysis, communication, and operational efficiency
12. Which Spring Cloud Config Server backend stores configuration in a relational database rather than Git? → JDBC backend (spring.cloud.config.server.jdbc)
13. What does the `@LoadBalanced` annotation do when applied to a RestTemplate bean in Spring Cloud? → Intercepts requests to resolve logical service names via the discovery client
14. What is the importance of data security in Spring Cloud digital applications? → Protecting sensitive information from unauthorized access, breaches, and loss is essential
15. Which of the following statements regarding dependency injection is correct? → It helps in decoupling application objects from each other.
16. What is the role of professional journals in Spring Cloud practice? → They disseminate current research, best practices, and professional developments
17. In Spring, can you inject null and empty string values? → Yes
18. What is the order of property source precedence when a Spring Cloud Config Client has both local application.yml and remote Config Server properties? → Config Server properties override local application.yml by default
19. Which actuator endpoint exposes the current state and metrics of all Resilience4j circuit breakers in a Spring Boot application? → /actuator/circuitbreakers
20. Which Resilience4j configuration property sets the percentage of failures required to trip the circuit breaker to Open state? → failureRateThreshold
21. What is the purpose of the `spring.application.name` property in a Spring Cloud microservice? → Acts as the service ID used for registration and discovery
22. Which Spring Cloud Config feature allows a running service to refresh its configuration without restarting? → Spring Cloud Bus with /actuator/refresh or /actuator/bus-refresh
23. What is the most effective communication approach for Spring Cloud professionals? → Adapting communication style to the audience while maintaining accuracy and clarity
24. Is it possible to combine Struts and Spring? → Yes
25. Which Eureka configuration property controls how long the server waits before evicting an instance that has stopped sending heartbeats? → eureka.instance.lease-expiration-duration-in-seconds
26. What is the benefit of standardized digital reporting in Spring Cloud practice? → It ensures consistency, enables comparison, and facilitates regulatory compliance
27. How do Spring Cloud professionals transfer knowledge from training to practice? → Through supervised practice, mentoring, gradual independence, and ongoing feedback
28. What is the default load balancing algorithm used by Spring Cloud LoadBalancer? → Round-robin
29. When does a Resilience4j circuit breaker enter the Half-Open state? → After the waitDurationInOpenState has elapsed while the circuit is Open
30. What Spring Cloud annotation enables a WebClient bean for load-balanced service calls? → @LoadBalanced applied to a WebClient.Builder bean