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Answer: A. Standard Reserved Instance
The most cost-effective EC2 instance purchasing option for a company needing a database server that must run constantly for 1 year is the Standard Reserved Instance (Option A). This option provides the highest discount levels, with savings of up to 72% compared to On-Demand Instance pricing. The discount is fixed for the term of the reservation, which in this case is 1 year. While Convertible Reserved Instances (Option B) offer flexibility to change instance types within the same family, they usually come at a slightly higher price. On-Demand Instances (Option C) and Spot Instances (Option D) do not provide the long-term cost savings associated with a commitment to a specific instance type and Availability Zone, making them less suitable for this scenario.
Author: LeetQuiz Editorial Team
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For a company requiring a continuously running, rightsized Amazon EC2 database server over a 1-year period, which purchasing option is the most cost-effective?
A
A. Standard Reserved Instance
B
B. Convertible Reserved Instance
C
C. On-Demand Instance
D
D. Spot Instance