Quick Answer
Idempotency in production: use client-generated idempotency keys for all state-changing operations. Store processed keys in Redis or DB with the result. On duplicate request, return the stored result instead of processing again. This makes retries (from network failures, timeouts, client retries) safe. Especially important for payments, inventory updates, and order processing.
Answer
Idempotency ensures repeated requests give same result. Critical for payments, retries, messaging. Techniques: unique request IDs, DB constraints.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
