AWS Certified Solutions Architect – Professional — Question 963

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[1]
are accessed frequently for the first 15 to 20 days, they are seldom accessed thereafter but always need to be immediately available. The CIO has asked to find ways to reduce costs.
Which of the following options will reduce costs? (Choose two.)

Answer options

• A. Purchase Reserved instances for baseline capacity requirements and use On-Demand instances for the demand spikes. [1]
• C. Use On-Demand instances for baseline capacity requirements and use Spot Fleet instances for the demand spikes. [1]
• E. Create a script that checks the load on all web servers and terminates unnecessary On-Demand instances.

Correct answer: A, B

Explanation

Purchasing Reserved instances for baseline capacity (Option A) provides significant discounts compared to On-Demand pricing for predictable workloads. Utilizing Spot Fleet or On-Demand instances for demand spikes (Option B) allows the system to scale cost-effectively without over-committing resources. Relying on custom scripts to terminate instances (Option C) introduces operational overhead and is less efficient than native Auto Scaling solutions.