FrontendHaltNetworking·Beginner·Conceptual·1 min read
What does it mean for an HTTP method to be idempotent?
Short interview answer
Repeating the same request produces the same server-side end state as sending it once. It says nothing about whether the request has side effects or is safe to call at all — only that repeating it doesn't change the outcome further.
Key takeaway
Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.