Question #858
Which AWS Cloud characteristic allows automatic adjustment of compute resources to match varying application traffic?
Agility
Elasticity
Reliability
Durability
Explanation
The correct answer is B. Elasticity. Elasticity refers to the ability of a cloud system to automatically scale resources (e.g., adding/removing compute capacity) to match fluctuating application traffic. This ensures optimal performance during traffic spikes and cost efficiency during low usage.
- Why Elasticity?: AWS services like Amazon EC2 Auto Scaling and AWS Lambda use elasticity to dynamically adjust resources without manual intervention.
- Other Options:
- A. Agility: Focuses on rapid provisioning of resources for experimentation and innovation, not automatic scaling.
- C. Reliability: Ensures fault tolerance and system availability but does not involve resource scaling.
- D. Durability: Pertains to data protection (e.g., S3's 99.999999999% durability) and is unrelated to compute adjustments.
Key Point: Elasticity is critical for handling variable workloads efficiently, a core benefit of cloud computing.
Answer
The correct answer is: B