AWS Certified Cloud Practitioner / Question #1397 of 719

Question #1397

Which AWS Well-Architected Framework concept ensures that a system maintains continuous operation and data integrity during unexpected hardware failures?

A

Consistency

B

Elasticity

C

Durability

D

Latency

Explanation

The correct answer is C. Durability. Durability in the AWS Well-Architected Framework refers to the ability of a system to recover data and maintain availability during hardware failures. AWS services like Amazon S3 achieve this by redundantly storing data across multiple Availability Zones (AZs), ensuring data integrity and uninterrupted operation even if hardware components fail.

Why other options are incorrect:
- A. Consistency: Ensures data uniformity across distributed systems (e.g., strong vs. eventual consistency) but does not address hardware failure recovery.
- B. Elasticity: Focuses on scaling resources dynamically to meet demand, not on maintaining operation during failures.
- D. Latency: Relates to system responsiveness, not data integrity or availability.

Key Points:
- Durability ensures data persistence and system availability through redundancy.
- AWS services like S3, EBS, and DynamoDB are designed for high durability.
- Hardware failures are mitigated via multi-AZ replication and automated backups.

Answer

The correct answer is: C