REST API Interview Questions and Answers

Ques 21. What are the important components of the construction of RESTful web services.

• Resources
• Demand 
• Headers
• Status codes
• Request Body
• Response Body

Ques 22. What distinguishes REST and SOAP from one another?

REST(Representational State Transfer): 

• It is a web service development architectural design pattern.
• It is more cacheable and speedier in speed.
• It just takes on the protocol-specific security measures that have been put in place.

SOAP (Simple Object Access Protocol): 

• It is a stringent protocol that is used to provide safe APIs.\
• It is not cacheable and moves more slowly.
• It can specify its own security precautions.

For more differences please check here: REST vs SOAP

Ques 23. Describe the architectural design used to provide web APIs.

The architectural design used to create web APIs is

• Client-server communication via HTTP
• As a formatting language, XML/JSON
• Simple URI is used as the services' address.
• Stateless interaction

Ques 24. Explain the differences between RPC and document-style web services.

In contrast to RPC-style web services, document-style web services allow us to send an XML document as part of a SOAP request.

The application where a document-style web service is most suitable is one where an XML message behaves like a document, the content of which is subject to change, and the purpose of the web service is independent of the contents of XML messages.

Ques 25. What are JAX-WS and JAX-RS?

Both JAX-WS and JAX-RS are frameworks (APIs) that allow for different types of communication in Java. A library called JAX-WS can then be used to do SOAP communications in Java, whereas JAX-RS enables REST communication.