AWS Certified Cloud Practitioner (CLF-C02)Cloud Technology and ServicesEasy
A mobile app backend experiences unpredictable spikes in traffic throughout the day. The company wants EC2 instances to be added or removed automatically based on real-time demand to maintain performance while controlling cost. Which AWS feature should the company use?
- AAmazon Route 53 failover routing
- BAmazon EC2 Auto Scaling
- CAWS Snowball
- DAWS Direct Connect
Show answer & explanationAnswer & explanation
Correct answer: B. Amazon EC2 Auto Scaling
Amazon EC2 Auto Scaling automatically launches or terminates instances based on demand, health checks, or a defined schedule, matching capacity to traffic patterns.
Why the other options are wrong
- A. Route 53 failover routing handles DNS failover, not compute scaling.
- C. Snowball is a physical data transfer device, unrelated to scaling.
- D. Direct Connect provides a dedicated network link, not scaling.
EC2 Auto Scaling
A service that automatically adjusts the number of EC2 instances in a group based on demand, health checks, or schedules.
- Uses scaling policies (target tracking, step, scheduled)
- Maintains minimum, desired, and maximum instance counts
- Improves availability and cost efficiency
Memory trick: Auto Scaling breathes in and out with traffic.