Can you give examples of HTTP methods that do not guarantee the same result upon repeated requests?

HTTP methods that do not guarantee the same result upon repeated requests are called non-idempotent. Main examples of such methods:

• POST — used for creating resources or performing operations that change the server's state. A repeated POST request may lead to creating multiple resources or executing the operation again.
• PATCH — used for partial updates of a resource. A repeated request can modify the resource multiple times.

Unlike them, methods like GET, PUT, DELETE are considered idempotent, meaning that repeated requests with the same parameters will not further change the server's state.