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CLF-C02 Practice Question 92: Automatic Recovery

AWS Certified Cloud Practitioner (CLF-C02) · Test 10 · question 2 of 10

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An online store tracks a business metric, orders successfully processed per minute. When that metric drops below a threshold, automation immediately replaces or repairs the failing components, without waiting for an engineer to notice the problem. Which design principle of the AWS Well-Architected Framework reliability pillar does this implement?

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Answer:

A. Automatically recover from failure

Automatically recover from failure means monitoring a workload for key performance indicators (KPIs) and starting automation when a threshold is breached. AWS stresses that these KPIs should measure *business value*, like orders processed, rather than technical details of how the service operates. The result is automatic notification and tracking of failures, and automated recovery processes that work around or repair them.

Option B, test recovery procedures, is about deliberately simulating failures, for example in a test environment, to validate recovery *before* a real failure happens. Option C, scale horizontally, replaces one large resource with multiple smaller ones so that a single failure has less impact on the overall workload. Option D, manage change through automation, means making changes to *infrastructure* through automation that can be tracked and reviewed. It is about planned changes, not responding to failures.

Reference: Reliability design principles

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