AWS (Amazon Web Services) Certification Practice Exam

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Prepare for your AWS Certification Exam with flashcards and multiple-choice questions. Each question comes with hints and detailed explanations to help you succeed. Enhance your skills and be ready for the exam!

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How can you reserve instances to get a reduced cost over a set period of time?

On-Demand Instances
Spot Instances
Scheduled Instances
Reserved Instances

The correct answer is: Reserved Instances

Choosing Reserved Instances is an effective way to reduce costs on AWS over a set period of time. This option allows customers to commit to using a specific instance type in a specified region for a one or three-year term in exchange for a significant discount compared to On-Demand pricing. When you opt for Reserved Instances, you pay an upfront fee, which can be beneficial for predictable workloads with consistent usage. There are also options for partial payments, making it flexible based on budget preferences. This model is designed for users who know their resources will be utilized consistently and can be more cost-effective compared to paying for instances on an On-Demand basis, which can be more expensive over time. In contrast, On-Demand Instances can be more expensive in the long run, as they are billed by the hour based on consumption without any long-term commitment. Spot Instances allow users to take advantage of unused EC2 capacity at a lower cost, but these can be interrupted by AWS, which may not be suitable for all workloads. Scheduled Instances offer a way to reserve capacity for specific time periods but do not provide the same cost savings as Reserved Instances, which guarantee pricing and availability over a longer commitment.