Practice Test 1 | AWS Certified Cloud Practitioner | CLF-C01 | Dumps | Mock Test

Answer – D

If the database is going to be used for a minimum of one year at least, it is better to get Reserved Instances. You can save on costs if you use partial upfront options.

• For more information on AWS Reserved Instances, please visit the Link:
  • https://aws.amazon.com/ec2/pricing/reserved-instances/

• A is incorrect. Spot instances can be terminated with fluctuations in market prices. Unless the question specifies a use case where high availability is not a requirement, this cannot be assumed.
• B is incorrect. On-Demand is not the most cost-efficient solution.
• C is incorrect. No upfront payment is required. However, it’s a costlier option than Partial/All upfront payment.

• For more information on the Reserved Instances Payment option, please check below AWS Docs:
  • https://docs.aws.amazon.com/aws-technical-content/latest/cost-optimization-reservation-models/reserved-instance-payment-options.html

Note:

• Reserved Instances do not renew automatically. When they expire, you can continue using the EC2 instance without interruption. But you are charged On-Demand rates. In the above example, when the Reserved Instances that cover the T2 and C4 instances expire, you go back to paying the On-Demand rates until you terminate the instances or purchase new Reserved Instances that match the instance attributes.
  • https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-reserved-instances.html