Answer-first summary for fast verification
Answer: Reliability
The correct answer is B. Reliability. The reliability pillar of the AWS Well-Architected Framework is focused on ensuring that workloads perform their intended functions and can recover quickly from failures. This includes designing for fault tolerance, implementing high availability, planning for disaster recovery, and having the ability to scale resources dynamically to meet changing demands. The other options, while important, do not directly address the system's ability to recover from disruptions and scale to meet demand: A. Security is about protecting information and systems; C. Performance Efficiency is about optimizing resource use and system throughput; D. Cost Optimization is about using resources efficiently to control costs.
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In the AWS Well-Architected Framework, which pillar addresses a system's capability to withstand infrastructure failures, service disruptions, and to scale resources in response to varying demands?
A
Security
B
Reliability
C
Performance Efficiency
D
Cost Optimization