Which option is NOT a pillar of the AWS Well-Architected Framework?

Disaster Recovery is not recognized as one of the formal pillars of the AWS Well-Architected Framework. The framework consists of five key pillars: Operational Excellence, Security, Reliability, Performance Efficiency, and Cost Optimization. Each of these pillars serves as a guideline for architects to manage and optimize workloads in the cloud effectively.

While Disaster Recovery is an important aspect of IT architecture and can be associated with several pillars—particularly Reliability and Operational Excellence—it is not explicitly listed as a standalone pillar. Understanding the correct pillars helps professionals assess how effectively their systems align with AWS's best practices and improve the overall architecture's resilience and efficiency.