AWS Certified Cloud Practitioner — Question 288

Which of the following are design principles for reliability in the AWS Cloud? (Choose two.)

Answer options

• A. Build architectures with tightly coupled resources.
• B. Use AWS Trusted Advisor to meet security best practices.
• C. Use automation to recover immediately from failure.
• D. Right size Amazon EC2 instances to ensure optimal performance.
• E. Simulate failures to test recovery processes.

Correct answer: C, E

Explanation

Testing recovery procedures by simulating failures (Option E) and automatically recovering from failure using automation (Option C) are core design principles for reliability in the AWS Well-Architected Framework. Tightly coupling resources (Option A) reduces reliability, while optimizing EC2 instance sizes (Option D) and using AWS Trusted Advisor for security (Option B) align with performance, cost, and security pillars rather than reliability design principles.