AWS Certified SysOps Administrator – Associate (legacy) — Question 427

The billing process for Amazon EC2 instances was updated as of October 2, 2017. Which of the following statements is true regarding how you pay for Amazon EC2 instances? (Choose two.)

Answer options

• A. Payment does not vary based on the instance AMI's operating system.
• B. You can pay per hour or per second, depending on the instance AMI's operating system.
• C. You pay for compute capacity by the day; hours are billed in proportion.
• D. You can pay per hour or per second, depending on the instance type.

Correct answer: B, D

Explanation

Amazon EC2 billing allows for per-second or per-hour pricing models depending on both the operating system of the AMI (such as Amazon Linux vs. certain commercial OSs) and the specific instance type. Since billing can vary by OS and is not calculated on a daily basis, options B and D are correct, while options A and C are incorrect.