FrontendHaltNetworking·Intermediate·Conceptual·1 min read
What is the practical risk of a client automatically retrying a timed-out POST?
Short interview answer
If the original request actually reached the server and succeeded before the timeout, an automatic retry can create a duplicate resource or trigger the action twice, since POST has no idempotency guarantee to fall back on.
Key takeaway
Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.