Which HTTP methods are used in RESTful web services to perform CRUD operations?

• A. GET, POST, PUSH, DELETE
• B. GET, POST, PUT, DELETE
• C. SELECT, UPDATE, INSERT, REMOVE
• D. READ, WRITE, OPEN, CLOSE

Answer: (B)

RESTful web services use specific HTTP methods to align with CRUD (Create, Read, Update, Delete) operations. The correct answer identifies two widely accepted HTTP methods for this purpose: POST and PUT for creating and updating resources, respectively, as well as GET for reading resources and DELETE for removing them.

GET is utilized to retrieve data from a server, which corresponds to the 'Read' operation in CRUD. When clients need to create a new resource, they use POST, which submits data to the server, aligning with the 'Create' operation. For updating existing resources, the PUT method is used, making changes to the resource, which reflects the 'Update' operation in CRUD. Finally, DELETE is employed to remove resources from the server, mapping directly to the 'Delete' operation.

The other options present methods that do not conventionally align with CRUD operations as recognized in RESTful services. For instance, the use of PUSH is not standard in the context of traditional CRUD functionality. Similarly, SELECT, UPDATE, INSERT, and REMOVE, while they may describe CRUD operations, do not map to the standardized HTTP methods recognized in REST. Lastly, the terms READ, WRITE, OPEN, and CLOSE do not correspond to any standard HTTP methods and do not fit