CLF-C02 Cloud Concepts Practice Question
A company's architecture team is evaluating their multi-tier application against the AWS Well-Architected Framework. They discover that their database has no backup and recovery procedure. Which pillar does this finding fall under?
⚠ Common exam trap
A common mix-up: candidates confuse the lack of a backup procedure with a Security issue (data protection) or an Operational Excellence issue (process gap), but the AWS Well-Architected Framework explicitly places backup and recovery under the Reliability pillar because it directly impacts the workload's ability to recover from failure.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Reliability
The Reliability pillar of the AWS Well-Architected Framework focuses on ensuring that workloads can recover from infrastructure or service disruptions, acquire computing resources to meet demand, and mitigate transient or persistent failures. A database without a backup and recovery procedure directly violates the 'Backup and Restore' design principle, which is a core component of reliability because it ensures data durability and the ability to restore operations after a failure. Without backups, any data corruption or loss event would result in permanent data loss, making the system unreliable.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Security
Why it's wrong here
The Security pillar is concerned with protecting data confidentiality and integrity through identity management, encryption, and access control. While backups should be encrypted and access-restricted, the requirement to create and maintain backups addresses durability and recoverability after a failure, not unauthorized access. A database lacking any backup exposes the organization to permanent data loss, which is fundamentally a reliability failure rather than a security breach.
- ✗
Operational Excellence
Why it's wrong here
Operational Excellence focuses on operational health through monitoring, observability, and continuous process improvement. Having a backup strategy is an architectural mechanism to meet recovery time and recovery point objectives after a disruptive event, which is a Reliability responsibility. Even if a team has excellent operational runbooks, the absence of backups means the workload cannot survive data loss, so this gap falls squarely under Reliability.
- ✓
Reliability
Why this is correct
The Reliability pillar ensures workloads can recover from infrastructure or service disruptions and meet recovery objectives (RTO/RPO). A database without any backup cannot restore lost data after an accidental deletion, corruption, or disaster, leaving the system unable to recover — a direct violation of this pillar. Implementing periodic backups and validating restoration processes is a core reliability practice for any stateful workload.
- ✗
Cost Optimization
Why it's wrong here
Cost Optimization aims to maximize business value by rightsizing resources, using appropriate pricing models, and eliminating unused or underutilized capacity. While retaining backups generates storage and retrieval costs, it is not a cost-saving activity; rather, it is an investment in durability and recoverability. Deciding to forgo backups to cut costs merely trades a reliability requirement for potential catastrophic loss, so the absence of backups indicates a reliability gap, not a cost optimization strategy.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CLF-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CLF-C02 exam.