Spring Boot Microservices MCQ - Multiple Choice Questions and Answers

With Spring Boot, creating scalable and easily maintainable microservices becomes not just possible, but also efficient and straightforward. For those embarking on their Spring Boot microservices journey or looking to validate their existing knowledge, this set of multiple-choice questions offers a comprehensive test of the basics. Dive in and discover where you stand!

1. Which of the following is a primary advantage of using microservices?

a) Monolithic architecture

b) Tight coupling

c) Scalability

d) Single point of failure

Answer:

c) Scalability

Explanation:

One of the primary advantages of microservices is scalability. Each service can be scaled independently based on its individual requirements.

2. In a microservices architecture, what does each service typically have?

a) Shared database

b) Its own database

c) No database

d) Centralized database

Answer:

b) Its own database

Explanation:

In a microservices architecture, each service typically has its own database to ensure loose coupling and service independence.

3. Which Spring project helps in building microservices?

a) Spring MVC

b) Spring Batch

c) Spring Cloud

d) Spring JDBC

Answer:

c) Spring Cloud

Explanation:

Spring Cloud provides a suite of tools for building and working with microservices.

4. For service discovery in a Spring Boot microservices setup, which tool can be used?

a) Eureka

b) Hystrix

c) Ribbon

d) Zuul

Answer:

a) Eureka

Explanation:

Eureka is used as a service discovery tool in a Spring Boot microservices setup.

5. What is the primary purpose of Spring Cloud Config Server?

a) Load balancing

b) Circuit breaking

c) Centralized configuration management

d) Service discovery

Answer:

c) Centralized configuration management

Explanation:

Spring Cloud Config Server provides centralized configuration management, enabling you to manage configurations across multiple services.

6. In microservices communication, which protocol is lightweight and commonly used?

a) HTTP

b) FTP

c) SMTP

d) GRPC

Answer:

d) GRPC

Explanation:

GRPC is a lightweight protocol commonly used in microservices communication because of its efficiency, especially with large-scale systems.

7. Which pattern helps in avoiding network calls by using the latest known state?

a) Saga

b) Circuit Breaker

c) API Gateway

d) CQRS

Answer:

d) CQRS

Explanation:

The Command Query Responsibility Segregation (CQRS) pattern helps avoid unnecessary network calls by using the most recent known state.

8. Which pattern is used to ensure data consistency across microservices in long-running transactions?

a) Saga

b) Circuit Breaker

c) API Gateway

d) CQRS

Answer:

a) Saga

Explanation:

The Saga pattern is a way to manage data consistency across microservices in long-running transactions.

9. Which Spring Cloud component helps in tracing requests across multiple services?

a) Spring Cloud Tracer

b) Spring Cloud Sleuth

c) Spring Cloud Finder

d) Spring Cloud Debugger

Answer:

b) Spring Cloud Sleuth

Explanation:

Spring Cloud Sleuth helps in tracing requests across multiple services, providing insights into the lifecycle of a request.

10. In a microservices architecture, what is a fundamental design principle?

a) Tight coupling

b) Shared databases

c) Monolithic deployment

d) Service independence

Answer:

d) Service independence

Explanation:

Service independence is fundamental to microservices design, allowing each service to operate and evolve separately.

11. Which of the following is a pattern to prevent system failures from cascading?

a) Load Balancer

b) Circuit Breaker

c) Service Registry

d) Event Bus

Answer:

b) Circuit Breaker

Explanation:

The Circuit Breaker pattern helps prevent cascading failures by halting system operations if certain failure conditions are met.

12. How does Spring Boot enable quick application development?

a) By eliminating the need for coding

b) By providing pre-built UI templates

c) Through auto-configuration and starters

d) By auto-generating algorithms

Answer:

c) Through auto-configuration and starters

Explanation:

Spring Boot simplifies application development by providing auto-configuration and starters, which reduce boilerplate setup.

13. Which communication style is typically synchronous in a microservices architecture?

a) RESTful APIs

b) Websockets

c) Messaging queues

d) Event-driven

Answer:

a) RESTful APIs

Explanation:

RESTful APIs are typically synchronous, while other communication styles like messaging queues or event-driven might be asynchronous.

14. For resilient microservices communication, which Spring Cloud component provides intelligent routing and remote call handling?

a) Eureka

b) Ribbon

c) Feign

d) Zuul

Answer:

c) Feign

Explanation:

Feign simplifies remote call handling by providing intelligent routing, integrated load balancing, and more.

15. In microservices architecture, why are centralized logging and monitoring crucial?

a) For improved performance

b) To ensure each microservice uses the same technology stack

c) To detect system issues across services and trace them easily

d) To reduce the number of microservices

Answer:

c) To detect system issues across services and trace them easily

Explanation:

Centralized logging and monitoring are essential in a microservices architecture because services are distributed. Centralized solutions help in quickly detecting, tracing, and resolving system issues that might span multiple services.

16. Which Spring Cloud component helps in managing and handling application's sensitive information in a microservices setup?

a) Spring Cloud Security

b) Spring Cloud Vault

c) Spring Cloud Config

d) Spring Cloud Stream

Answer:

b) Spring Cloud Vault

Explanation:

Spring Cloud Vault is designed for managing and handling sensitive application data like passwords, API keys, and other secrets. It ensures these details are securely stored, retrieved, and managed.

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