AWS Certified SysOps Administrator – Associate (legacy) — Question 610

A sysops administrator is trying to deploy a new Amazon EC2 instance using the AWS Management Console, but the instance is failing to launch.
What could be causing this problem? (Choose two.)

Answer options

• A. The AWS account has reached EC2 limits for the Region.
• B. The AWS account has reached EC2 limits for the Availability Zone.
• C. An EC2 key pair has not been specified.
• D. The EC2 instance is missing an instance profile with ec2:RunInstances permissions.
• E. The subnet being used has no more usable private IP addresses.

Correct answer: A, D

Explanation

Exceeding the regional service limits for EC2 instances in an AWS account will prevent any new instances from launching. Additionally, if the required IAM permissions such as ec2:RunInstances are missing from the instance profile or the user's IAM policy, the launch attempt will be denied. Key pairs are not strictly required to launch an instance, and EC2 instance limits are applied at the Region level rather than per Availability Zone.