AWS Certified Cloud Practitioner (CLF-C02)Cloud ConceptsMedium
A company designs its e-commerce application to automatically fail over across multiple Availability Zones and regularly tests disaster recovery procedures to ensure the system can recover quickly from component failures. Which Well-Architected Framework pillar does this best represent?
- ASustainability
- BOperational Excellence
- CReliability
- DSecurity
Show answer & explanationAnswer & explanation
Correct answer: C. Reliability
The Reliability pillar focuses on the ability of a workload to recover from infrastructure or service disruptions, dynamically acquire resources, and mitigate failures such as misconfigurations or transient network issues. Multi-AZ failover and DR testing are hallmark reliability practices.
Why the other options are wrong
- A. Sustainability targets environmental impact, unrelated here.
- B. Operational Excellence focuses on running and monitoring systems, not specifically failure recovery design.
- D. Security is about protecting against threats, not failure recovery.
Reliability Pillar
A Well-Architected pillar ensuring a workload performs its intended function correctly and consistently, recovering from failures automatically.
- Includes multi-AZ/multi-region design
- Focuses on automated recovery
- Tests disaster recovery plans
Memory trick: Reliability = Recover, Rebound, Repeat.