In REST/HTTP semantics, "safe" means a method causes no server-side state change, and "idempotent" means repeated identical requests always produce the same end result. Which classification below is correct?

GET only retrieves data without altering server state (safe), and repeating an identical GET yields the same result (idempotent). POST typically creates a new resource or triggers a side effect on every call, so it is neither safe nor idempotent. PUT replaces a resource's entire state; repeating an identical PUT leaves the resource in the same end state (idempotent), but since it does modify server state, it is not safe. DELETE behaves similarly to PUT: it changes state (not safe) but repeating it produces the same end state (idempotent).