Reserved Instances come with a minimum commitment period. The minimum time commitment for a Reserved Instance is typically one year or three years, depending on the type of Reserved Instance you choose.
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.
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. Reserved Instances are best suited for workloads that run continuously for a year or longer, while Spot Instances are most cost-effective for workloads that can tolerate downtime and have flexible start and end times. Dedicated Instances are not a pricing model, but rather a physical Amazon EC2 server dedicated to a single customer.
Answer: B. Reserved Instances
Explanation:
On-Demand Instances are the most expensive option, as you pay for every hour you use them. Reserved Instances are prepaid instances that can offer you significant discounts on On-Demand prices. You can buy Reserved Instances for one or three years and get discounts of up to 75% on On-Demand prices.
When you purchase Reserved Instances on AWS, they come with a minimum commitment period. The minimum time commitment for a Reserved Instance is typically one year or three years, depending on the type of Reserved Instance you choose.
its needed only for 1 day (24 hours) in a whole year. A reserved instance for a whole year, even with 75% discount would cost more than an on demand host for 24 hours.
A. With On-Demand Instances, you pay for the compute capacity by the hour or second depending on the instance type without any upfront costs or long-term commitments.
A.) On-Demand: per hour or per second, is not needed any prior contract, build a baseline. Ideal for short-term, irregular workloads that can’t be interrupted
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