An application uses Amazon EC2 instances in an Auto Scaling group behind an ALB. During sudden, massive spikes in traffic, the Auto Scaling group takes 5 minutes to launch new instances, during which time the application becomes unresponsive. Which TWO strategies will improve reliability during these spikes? (Select TWO)

Answer options:

Implement Predictive Scaling.

Decrease the health check grace period.

Use a Network Load Balancer instead of an ALB.

Create a custom AMI with all dependencies pre-installed.

Increase the ALB timeout settings.

Use Step Scaling instead of Target Tracking.

How to approach this question

Identify ways to scale proactively and reduce instance boot time.

Full Answer

Predictive Scaling analyzes historical traffic and scales out before the spike occurs. Creating a custom AMI (baking) removes the need to download and install software during boot, significantly reducing the 5-minute launch time.

Common mistakes

Changing load balancers, which doesn't affect EC2 initialization speed.

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Practice the full AWS Solutions Architect Professional SAP-C02 Practice Exam 6

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