Examtopics

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• 正解だと思う選択肢: D

  A. Reserved Instances (RIs): Reserved Instances provide capacity reservation for a specified term (usually one or three years), offering cost savings compared to On-Demand Instances. However, RIs may not be the most suitable for a short duration like 2 months, as they typically involve longer-term commitments.

  B. Dedicated Hosts: Dedicated Hosts may not be cost-effective for short-term workloads and lack the flexibility needed.

  C. Spot Instances: Spot Instances offer cost savings but can be terminated with short notice, potentially causing interruptions.

  D. On-Demand Instances: On-Demand Instances provide capacity on a pay-as-you-go basis with no upfront commitment. They are suitable for short-term, variable workloads, offering flexibility without the need for long-term commitments. In this scenario, On-Demand Instances would be a cost-effective option for the 2-month duration while avoiding downtime.

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  TheFivePips2024/09/21

• D - On-Demand Instances is correct.

  "On-Demand Instances are recommended for: • Users that prefer the low cost and flexibility of EC2 without any upfront payment or long-term commitment • Applications with short-term, spiky, or unpredictable workloads that cannot be interrupted • Applications being developed or tested on EC2 for the first time"

  Reference: https://aws.amazon.com/ec2/pricing/

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  isaphiltrick2023/10/12
• 正解だと思う選択肢: D

  Reserved instances are also on-demand instances which must match certain attribute such as instance type and Region, in order to benefit from the billing discount. They are cheaper than On-Demand Instances but any on-demand instance which can be reserved must be reserved for at least for one year. This case scenario demands the application usage only for 2 months and hence Option A - Reserved instances cannot be an answer. With Spot instances once cannot guarantee 100% uptime and so that is also out of window. Dedicated host will be costly comparison to on-demand instance. Hence the answer id D.

  https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-reserved-instances.html#:~:text=You%20can%20purchase%20a%20Reserved%20Instance%20for%20a%20one%2Dyear%20or%20three%2Dyear%20commitment%2C%20with%20the%20three%2Dyear%20commitment%20offering%20a%20bigger%20discount.

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  BShelat2024/09/21