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CLF-C02 Practice Question 3: Well Architected Pillars

AWS Certified Cloud Practitioner (CLF-C02) · Test 1 · question 3 of 10

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An architecture review team is deciding whether to move a reporting workload to a newer instance type and to adopt a purpose-built database, so that the system keeps meeting its latency targets as demand grows and as new AWS technologies become available. Which pillar of the AWS Well-Architected Framework covers this activity?

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Answer:

  • D. Performance efficiency

The performance efficiency pillar is about using computing resources efficiently to meet system requirements, and maintaining that efficiency as demand changes and technologies evolve, which is precisely selecting the right instance types and purpose-built data stores and revisiting those choices over time.

Option A, operational excellence, covers running and monitoring systems and continuously improving processes and procedures. Option B, reliability, covers a workload performing its intended function correctly and consistently, including recovery from failure. Option C, cost optimization, is about avoiding unnecessary cost, a tempting choice because right-sizing also saves money, but the stated driver here is meeting latency targets, not reducing spend. The framework has six pillars in total; sustainability and security are the remaining two.

Reference: The pillars of the AWS Well-Architected Framework

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