Answer
Idempotency ensures that repeating the same request produces the same result. It is critical for retries, payment processing, and message handling to prevent duplication.
Quick Answer
Idempotency means calling an operation multiple times gives the same result as calling it once. Critical in microservices because retries are common. Use idempotency keys (client sends a unique ID with each request, server stores results and returns the same response for duplicate IDs). Makes retries safe - no duplicate orders, no duplicate charges.
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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.
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Source: SugharaIQ