API Testing Using Postman: Implemented CRUD Operations with Express.js, MongoDB, and Node.js provides a detailed guide on how to use Postman for API testing. It covers the following key points:

1. Introduction to APIs and API Testing:

Defines APIs and explains the importance of API testing, which focuses on functionality, reliability, performance, and security of APIs.

2. Postman Overview:

Introduces Postman as a scalable API testing tool that can be integrated into CI/CD pipelines. It provides step-by-step instructions on installing and using Postman, including its workspace features.

3. HTTP Methods:

• GET: Used to retrieve information from the server.

• POST: Used to submit data to the server.

• PUT: Used to update existing resources or create new ones.

• DELETE: Used to remove resources.

• PATCH, HEAD, and OPTIONS: Additional HTTP methods for specific purposes.

4. CRUD Operations with Express.js, MongoDB, and Node.js:

• GET Requests: Example of retrieving user data from MongoDB.

• POST Requests: Example of adding new user data to MongoDB.

• PUT Requests: Example of updating existing user data.

• DELETE Requests: Example of deleting user data.

5. Testing API Endpoints with Postman:

Demonstrates how to create, update, and delete requests using Postman, including setting request parameters, headers, and body content.

6. Examples and Visualizations:

Provides screenshots and detailed examples for each type of request to illustrate the process.

Overall, the document serves as a comprehensive guide for implementing and testing CRUD operations using Postman, Express.js, MongoDB, and Node.js.