AWS Certified Solutions Architect – Professional — Question 95

An Auto Scaling group is running at the desired capacity of 5 instances and receives a trigger from the Cloudwatch Alarm to increase the capacity by 1. The cool down period is 5 minutes. Cloudwatch sends another trigger after 2 minutes to decrease the desired capacity by 1.
What will be the count of instances at the end of 4 minutes?

Answer options

• A. 4
• B. 5
• C. 6
• D. 7

Correct answer: C

Explanation

After the first Cloudwatch trigger, the Auto Scaling group increases its count to 6 instances. Since the cool down period is 5 minutes, the second trigger to decrease the capacity by 1 does not take effect immediately and will only reduce the count after the cool down period has elapsed. Therefore, at the end of 4 minutes, the count of instances remains at 6.