Java Interview questions on Web Services and Microservices

Categories: OTHERS

Let's look at some questions about REST web services and Microservices architecture now.

Q.1. Difference between SOAP-based and REST-based web services? 

Ans. SOAP is protocol-based with rigid structure, while REST is architectural style based on stateless communication with flexible endpoints.

Q.2. What is SOAP Envelope?

Ans. It encapsulates the entire SOAP message and defines its structure.

Q.3. How to implement security in RESTful web service?

Ans. Implement SSL/TLS for encryption and authentication.

Q.4. What is Payload in REST?

Ans. It's the data transmitted in the body of the HTTP request or response.

Q.5. What is Microservices? 

Ans. It's an architectural style where applications are composed of small, independent services.

Q.6. What is the difference between Microservices and REST? 

Ans. Microservices refer to architectural design, while REST is an architectural style for networked applications.

Q.7. What is the difference between Monolithic and Microservices?

Ans. Monolithic has single codebase, while Microservices have multiple, independent components; Monolithic can have higher latency.

Q.8. What problem does SAGA pattern solve?

Ans. It manages distributed transactions in Microservices architecture.

Q.9. What is service discovery in Microservices?

Ans. It's the mechanism for locating services dynamically within a Microservices architecture.

Q.10. What are common Microservices Patterns you have used in your project?

Ans. Service Registry, Circuit Breaker, API Gateway.