AWS Certified Cloud Practitioner
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A company has an uninterruptible application that runs on Amazon EC2 instances. The application constantly processes a backlog of files in an Amazon Simple Queue Service (Amazon SQS) queue. This usage is expected to continue to grow for years.
What is the MOST cost-effective EC2 instance purchasing model to meet these requirements?
Real Exam
Community
RRitesh
0
A
Spot Instances
B
On-Demand Instances
C
Savings Plans
D
Dedicated Hosts
Explanation:
Explanation
Savings Plans is the most cost-effective option for this scenario because:
- Long-term usage: The application is expected to grow for years, making it ideal for commitment-based pricing models
- Uninterruptible requirement: The application cannot tolerate interruptions, which rules out Spot Instances
- Cost savings: Savings Plans offer significant discounts (up to 72%) compared to On-Demand pricing for consistent usage
- Flexibility: Unlike Reserved Instances, Savings Plans provide flexibility across instance families, sizes, regions, and operating systems
- Growing workload: As usage grows, the commitment can be adjusted to maintain optimal savings
Why other options are less suitable:
- Spot Instances: Not suitable for uninterruptible applications as they can be terminated with short notice
- On-Demand Instances: Most expensive option for long-term, consistent workloads
- Dedicated Hosts: More expensive and typically used for compliance requirements, not cost optimization for standard applications
Savings Plans provide the best balance of cost savings and reliability for this long-term, uninterruptible workload.
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