Design cost-optimized architectures
32 practice questions with explanations — 15 free to try
PassNova has 32 AWS Solutions Architect (SAA-C03) practice questions on Design cost-optimized architectures, each with a clear explanation. A 15-question taster is free with no sign-up; the full bank is part of PassNova Premium. Updated for 2026.
Design cost-optimized architectures: example questions & answers
2 worked examples with answers and explanations below. Try 15 AWS Solutions Architect (SAA-C03) questions free in the browser; the full 32-question Design cost-optimized architectures bank is part of PassNova Premium.
A company needs to store infrequently accessed data that must be retrieved within milliseconds when needed. Which S3 storage class is the MOST cost-effective for this requirement?
- AS3 Standard
- BS3 Standard-Infrequent Access✓
- CS3 Glacier Deep Archive
- DS3 Glacier Flexible Retrieval
Answer: S3 Standard-IA offers millisecond access at a lower storage cost than S3 Standard, ideal for infrequently accessed data that still needs rapid retrieval. Glacier classes have retrieval delays.
A workload has predictable steady-state usage running 24/7 for the next three years. Which EC2 pricing model offers the LOWEST cost?
- AOn-Demand Instances
- BSpot Instances
- CReserved Instances or Savings Plans✓
- DDedicated Hosts billed hourly
Answer: For steady, long-term workloads, Reserved Instances or Savings Plans provide significant discounts over On-Demand in exchange for a one or three year commitment.