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Auto Scaling Groups

5 minutes 5 Questions

Auto Scaling Groups (ASGs) are the core component of AWS Auto Scaling. They manage the lifecycle of Amazon EC2 instances and ensure that the desired number of instances is running in your specified availability zones. ASGs help maintain the overall health and performance of your application by dyna…

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AWS Certified Solutions Architect - Auto Scaling Groups Example Questions

Test your knowledge of Auto Scaling Groups

Question 1

Your website has an increase in traffic during specific hours of the day. To optimize instance capacity during peak hours, you need the Auto Scaling Group to increase the number of instances early morning and decrease them by evening. Which feature can help achieve this?

Correct Answer: Scheduled Scaling

Scheduled Scaling allows you to increase or decrease the number of instances in an Auto Scaling group based on a predefined schedule. By specifying the times when the scale-out or scale-in occurs, you can optimize resources efficiently for predictable traffic patterns.

Question 2

Your company has a web application running on multiple EC2 instances. To ensure high availability and fault tolerance, you have set up an Auto Scaling Group (ASG) with instances across multiple Availability Zones. Recently, your company experienced a spike in traffic, causing unhealthy instances. Which ASG configuration change will automatically replace the unhealthy instances?

Correct Answer: Enable the Health Check Type as 'EC2' and set a grace period

By setting the Health Check Type to 'EC2', the ASG detects unhealthy instances based on EC2 instance status checks. Using the health check grace period, the ASG gives ample time to launch an instance and become healthy before getting marked as unhealthy.

Question 3

You are a Solutions Architect in a global company that hosts an E-commerce website. You have multiple EC2 instances running your web server with an ELB distributing traffic. To avoid service interruptions, you configure an ASG to monitor traffic. Which policy would be ideal for scaling up or down based on traffic?

Correct Answer: Target Tracking Scaling Policy

Target Tracking Scaling Policies provide a convenient way to scale Auto Scaling groups based on dynamic traffic patterns. This policy scales based on predefined thresholds and tracks a specific metric (e.g., CPU utilization).

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