Domain 2.4: Reliability — AWS SAP-C02 Practice Question 75

How to approach this question

Recognize that flash sales are predictable events, making scheduled scaling the best approach.

Full Answer

A.Use AWS Auto Scaling Scheduled Actions to scale out the Auto Scaling group 15 minutes before the flash sale begins.✓ Correct

Reactive scaling (like Target Tracking or Step Scaling) relies on CloudWatch metrics. When traffic spikes instantly, it takes time for the metric to register, the alarm to fire, and the EC2 instances to boot and pass health checks. For predictable events like flash sales, the best practice is to use Scheduled Scaling. You configure the Auto Scaling group to increase its minimum capacity shortly before the sale begins, ensuring the compute is fully provisioned and ready to handle the instant load.

Common mistakes

Relying on reactive scaling (Target Tracking) for instantaneous, predictable traffic spikes.

How to approach this question

Full Answer

Common mistakes

Practice the full AWS Solutions Architect Professional SAP-C02 Practice Exam 5

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