A company has a critical application with a predictable, long-term workload. They need to ensure that they can always launch a specific EC2 instance type in the us-east-1a Availability Zone. They also want to reduce their EC2 costs compared to On-Demand pricing. Which purchasing option should they choose to meet both of these requirements?
Zonal Reserved Instances are the correct choice because they provide both a significant discount compared to On-Demand pricing and a capacity reservation within a specific Availability Zone. Regional Reserved Instances provide a discount and flexibility across Availability Zones but do not reserve capacity. On-Demand Capacity Reservations guarantee capacity in a specific Availability Zone but do not provide a pricing discount. Spot Instances offer the largest discounts but do not guarantee capacity and can be interrupted.
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AWS Cloud Practitioner CLF-C02
Billing, Pricing, and Support
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