Question

Describe an API architecture for a web application and what role does Postman play? Explain what REST is and how you implement CRUD with REST.

Answer 1

API Architecture----Web application architecture defines the interactions between applications, middleware systems and databases to ensure multiple applications can work together. When a user types in a URL and taps “Go,” the browser will find the Internet-facing computer the website lives on and requests that particular page.

The server then responds by sending files over to the browser. After that action, the browser executes those files to show the requested page to the user. Now, the user gets to interact with the website. Of course, all of these actions are executed within a matter of seconds. Otherwise, users wouldn’t bother with websites.

How it work-

• The code which lives in the browser and responds to user input
• The code which lives on the server and responds to HTTP requests.

Postman Plays an important role,  Postman is a popular API client that makes it easy for developers to create, share, test and document APIs. This is done by allowing users to create and save simple and complex HTTP/s requests, as well as read their responses. The result - more efficient and less tedious work. It Postman is a popular API client that makes it easy for developers to create, share, test and document APIs. This is done by allowing users to create and save simple and complex HTTP/s requests, as well as read their responses. The result - more efficient and less tedious work.

REST--REST or RESTful API design (Representational State Transfer) is designed to take advantage of existing protocols. While REST can be used over nearly any protocol, it usually takes advantage of HTTP when used for Web APIs. ... REST API Design was defined by Dr. Roy Fielding in his 2000 doctorate dissertation.

Implement Operations

• Mapping the CRUD operations to the HTTP methods
• Creating resources
• Updating resources
• Deleting resources
• Testing the RESTful operations
• Emulating the PUT and DELETE methods