What types of HTTP requests are you familiar with, and what are their differences?

GET, POST, PUT, DELETE, PATCH, HEAD, OPTIONS.

• GET: Requests data from the server. Has no request "body". Is idempotent (multiple executions of the request do not change the server state). Used for retrieving resources.

• POST: Sends data to the server for creating or processing a resource. Has a "body" in the request. Is not idempotent (multiple executions may lead to multiple resources being created). Used for submitting forms, uploading files.

• PUT: Sends data to the server to create or fully update a resource at the specified URL. Has a "body" in the request. Is idempotent (multiple executions lead to the same final state). Used for full resource updates.

• DELETE: Requests the deletion of a resource at the specified URL. Has no request "body". Is idempotent (repeated requests on an existing resource will delete it, subsequent calls will not change the state). Used for deleting resources.

• PATCH: Sends data to the server for partial updating of a resource at the specified URL. Has a "body" in the request. Is not idempotent (multiple executions may lead to different results depending on the content of the "body" of the request). Used for partial resource updates.

• HEAD: Requests only the response headers from the server, identical to those received with a GET request, but without the response "body". Used to check resource existence or retrieve metadata.

• OPTIONS: Requests information about available HTTP methods, parameters, and other capabilities for the given resource or server. Used for interaction capability negotiation.

Method	Purpose	Request "body" presence	Idempotent	Safe (does not change server state)
GET	Retrieve data	No	Yes	Yes
POST	Send data (create/process)	Yes	No	No
PUT	Full update/create	Yes	Yes	No
DELETE	Delete	No	Yes	No
PATCH	Partial update	Yes	No	No
HEAD	Get headers	No	Yes	Yes
OPTIONS	Get information about capabilities	No	Yes	Yes