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AWS Certified Cloud Practitioner · AWS
Select one answer.
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A. On-Demand Instances For an uninterruptible workload that runs once a year just for 24 hours, the most cost-efficient Amazon EC2 pricing model would be On-Demand Instances. On-Demand Instances are ideal for short-term workloads that spike periodically or unpredictable workloads that can’t be interrupted.
A is correct and B, C, D are not correct. "once a year for 24 hours" means that B. Reserved Instances should be excluded. "uninterruptible" means that C. Spot Instances should be excluded. "most cost-efficient" means that D. Dedicated Instances should be excluded.
There is a contradiction with uninterupted if spot instance