MCQs on Java Microservices | Modern Java Architecture
Enhance your understanding of Java Microservices with these 30 MCQs covering key concepts in microservice architecture, including building microservices with Spring Boot, creating RESTful web services, and implementing service discovery and API gateways.
MCQs on Java Microservices
Introduction to Microservices
- What is a microservice in software architecture?
- a) A small function in Java
- b) A single-service architecture
- c) A loosely coupled, independently deployable service
- d) A user interface component
- Which of the following is an advantage of microservices over monolithic architecture?
- a) High dependency on a central database
- b) Easier scalability and independent deployment
- c) Higher complexity in development
- d) Harder to manage and maintain
- Which protocol is most commonly used for communication between microservices?
- a) FTP
- b) SMTP
- c) HTTP/HTTPS
- d) SNMP
- Microservices are often organized around:
- a) Technical functions
- b) Business capabilities
- c) Security layers
- d) File storage
- What is a major challenge of using microservices in Java?
- a) Easier deployment
- b) Simplified code maintenance
- c) Managing inter-service communication
- d) Enhanced user interface
Building Microservices with Spring Boot
- Which Java framework is commonly used to build microservices?
- a) Struts
- b) Spring Boot
- c) Hibernate
- d) JSP
- In Spring Boot, which annotation is used to mark a class as a Spring Boot application?
- a)
@SpringService - b)
@SpringApplication - c)
@SpringBootApplication - d)
@SpringComponent
- a)
- Which of the following annotations is used in Spring Boot to create a RESTful web service?
- a)
@Controller - b)
@RestController - c)
@Service - d)
@Repository
- a)
- How can you define a port number for a Spring Boot application?
- a) In the
pom.xmlfile - b) Using
@PortNumberannotation - c) By setting
server.portinapplication.properties - d) By setting
spring.portinconfig.xml
- a) In the
- Which Spring Boot feature is used to bundle the dependencies and the application into a single executable JAR file?
- a)
spring-boot-loader - b)
spring-boot-maven-plugin - c)
spring-boot-jar - d)
spring-boot-cli
- a)
RESTful Web Services in Java
- What does REST stand for in RESTful web services?
- a) Representational State Transfer
- b) Real-Time Service Transfer
- c) Relational Service Technology
- d) Remote State Technology
- Which HTTP method is used to create a new resource in RESTful web services?
- a) GET
- b) POST
- c) DELETE
- d) PUT
- Which HTTP method is commonly used to update an existing resource?
- a) GET
- b) POST
- c) PUT
- d) DELETE
- What is the purpose of
@RequestMappingin Spring Boot?- a) To start the application
- b) To handle HTTP requests
- c) To secure the application
- d) To manage database connections
- In RESTful services, what format is most commonly used for data exchange?
- a) XML
- b) JSON
- c) CSV
- d) HTML
- In a RESTful API, what does the HTTP status code 404 indicate?
- a) Successful request
- b) Unauthorized request
- c) Resource not found
- d) Server error
- Which of the following is used to define the endpoint of a RESTful service in Spring Boot?
- a)
@RestEndpoint - b)
@GetMapping,@PostMapping, etc. - c)
@WebService - d)
@RestService
- a)
- In Spring Boot, what annotation is used to inject dependencies automatically?
- a)
@Autowired - b)
@Inject - c)
@Resource - d)
@Controller
- a)
- What is the purpose of
@PathVariablein Spring Boot?- a) To retrieve values from URL path segments
- b) To define HTTP headers
- c) To create a new HTTP session
- d) To define request parameters
- Which annotation is used to retrieve data from the URL query parameters in Spring Boot?
- a)
@PathVariable - b)
@RequestParam - c)
@GetParam - d)
@Param
- a)
Service Discovery and API Gateway
- What is the purpose of service discovery in microservices?
- a) To enhance data security
- b) To allow services to find and communicate with each other
- c) To simplify user interface design
- d) To connect the database with the application
- Which tool is commonly used for service discovery in Spring Boot applications?
- a) Spring Tool Suite
- b) Eureka Server
- c) Hibernate
- d) JPA Repository
- What role does an API Gateway play in microservices architecture?
- a) It handles inter-service authentication
- b) It directs requests to the appropriate microservices
- c) It serves as a data storage solution
- d) It enhances code readability
- Which of the following is NOT a responsibility of an API Gateway?
- a) Load balancing
- b) Service discovery
- c) Logging and monitoring
- d) Managing business logic
- Which of the following patterns can be implemented using an API Gateway?
- a) Circuit breaker pattern
- b) Singleton pattern
- c) Observer pattern
- d) Command pattern
- How does Spring Cloud Eureka facilitate service discovery?
- a) By setting up database connections
- b) By registering and locating services dynamically
- c) By creating RESTful services
- d) By managing client requests
- Which framework in Java helps implement API Gateway functionality?
- a) Spring Cloud Gateway
- b) JPA Repository
- c) Hibernate
- d) Spring Data JPA
- In Spring Boot, which annotation registers a microservice with Eureka Server?
- a)
@EnableEurekaServer - b)
@EnableDiscoveryClient - c)
@EnableRestController - d)
@EnableMicroservice
- a)
- What is a primary benefit of using API Gateway in microservices architecture?
- a) Easier user management
- b) Centralized routing and request handling
- c) Improved database performance
- d) Faster data storage
- Which protocol is commonly used by Eureka Server for service registration and discovery?
- a) HTTP
- b) RMI
- c) UDP
- d) SMTP
Answer Table
| Qno | Answer |
|---|---|
| 1 | c) A loosely coupled, independently deployable service |
| 2 | b) Easier scalability and independent deployment |
| 3 | c) HTTP/HTTPS |
| 4 | b) Business capabilities |
| 5 | c) Managing inter-service communication |
| 6 | b) Spring Boot |
| 7 | c) @SpringBootApplication |
| 8 | b) @RestController |
| 9 | c) By setting server.port in application.properties |
| 10 | b) spring-boot-maven-plugin |
| 11 | a) Representational State Transfer |
| 12 | b) POST |
| 13 | c) PUT |
| 14 | b) To handle HTTP requests |
| 15 | b) JSON |
| 16 | c) Resource not found |
| 17 | b) @GetMapping, @PostMapping, etc. |
| 18 | a) @Autowired |
| 19 | a) To retrieve values from URL path segments |
| 20 | b) @RequestParam |
| 21 | b) To allow services to find and communicate with each other |
| 22 | b) Eureka Server |
| 23 | b) It directs requests to the appropriate microservices |
| 24 | d) Managing business logic |
| 25 | a) Circuit breaker pattern |
| 26 | b) By registering and locating services dynamically |
| 27 | a) Spring Cloud Gateway |
| 28 | b) @EnableDiscoveryClient |
| 29 | b) Centralized routing and request handling |
| 30 | a) HTTP |