Home » Amazon » AWS Certified Cloud Practitioner » Which Amazon EC2 pricing model is the MOST cost efficient for an uninterruptible workload that runs once a year for 24 hours?
Which Amazon EC2 pricing model is the MOST cost efficient for an uninterruptible workload that runs once a year for 24 hours?
A. On-Demand Instances
B. Reserved Instances
C. Spot Instances
D. Dedicated Instances
Correct Answer: A
Explanation/Reference:
With On-Demand instances, you pay for compute capacity by the hour or the second depending on which instances you run. No longer-term commitments or upfront payments are needed. You can increase or decrease your compute capacity depending on the demands of your application and only pay the specified per hourly rates for the instance you use.
https://aws.amazon.com/ec2/pricing/
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On-Demand is Correct. It is not Reserved as you are not utilizing for 1 or 3 years.
Correct B, because uninterruptible workload that runs once a year for 24 hours
Correct Answer is C as questions says “workload runs once a year for 24 hours”
Spot Instances are a cost-effective choice if you can be flexible about when your applications run and if your applications can be interrupted. For example, Spot Instances are well-suited for data analysis, batch jobs, background processing, and optional tasks.
Cost-effective, but Spot instance can be interrupted any time which doest not comply with the requirements defined in question.
“A Spot Instance interruption notice is a warning that is issued two minutes before Amazon EC2 stops or terminates your Spot Instance.”