AWS Certified Solutions Architect – Associate (SAA-C02) — Question 59

A solutions architect is designing a system to analyze the performance of financial markets while the markets are closed. The system will run a series of compute- intensive jobs for 4 hours every night. The time to complete the compute jobs is expected to remain constant, and jobs cannot be interrupted once started. Once completed, the system is expected to run for a minimum of 1 year.
Which type of Amazon EC2 instances should be used to reduce the cost of the system?

Answer options

Correct answer: D

Explanation

Scheduled Reserved Instances are ideal for this scenario because they allow for the reservation of capacity for specific time frames, which aligns perfectly with the nightly compute tasks. Spot Instances and On-Demand Instances are not cost-effective for long-term, predictable workloads since they can lead to higher costs over time. Standard Reserved Instances are also less suitable here because they don't provide the scheduling flexibility required for this specific nightly operation.