FrontendHaltNetworking·Intermediate·Conceptual·1 min read
What should a 429 response include to be genuinely useful to the client?
Short interview answer
A Retry-After header telling the client how long to wait before trying again, so the client can back off deliberately instead of guessing an interval or retrying immediately and worsening the rate-limit condition.
Key takeaway
Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.