SAA-C03 Design Cost-Optimized Architectures Practice Question

A financial services company needs to store millions of small records for 7 years to meet regulatory requirements. The records are rarely accessed after the first 30 days. The company wants to minimize storage costs while maintaining the ability to retrieve any record within a few minutes if an audit occurs. Which solution is best?

⚠ Common exam trap

SAA-C03 often tests retrieval time distinctions between Glacier tiers, and candidates incorrectly assume Glacier Flexible Retrieval's Expedited tier always meets 'instant' requirements or confuse Deep Archive's retrieval time.

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

Amazon S3 Glacier Instant Retrieval.

S3 Glacier Instant Retrieval is designed for long-lived, rarely accessed data that still requires millisecond retrieval, making it ideal for regulatory archives where audits need quick access. It offers lower storage costs than S3 Standard-IA while maintaining instant retrieval, and it supports lifecycle transitions after 30 days. This matches the requirement to retrieve any record within a few minutes (instant retrieval is far faster) at minimal cost.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
Amazon S3 Standard-IA.
Why it's wrong here
Standard-IA is cheaper than Standard for storage, but it is more expensive than Glacier Instant Retrieval. Since the data is kept for 7 years and rarely accessed, the higher monthly storage fee of Standard-IA adds up significantly over time compared to the more specialized archival tiers.
✗
Amazon S3 Glacier Flexible Retrieval.
Why it's wrong here
Glacier Flexible Retrieval offers very low storage costs, but retrieval times range from 1 to 5 minutes (expedited) to several hours. While it meets the 'few minutes' requirement if expedited retrieval is used, the per-request cost for expedited retrieval is high. Instant Retrieval is often more predictable for small objects.
✓
Amazon S3 Glacier Instant Retrieval.
Why this is correct
This storage class provides the low cost of Glacier storage with the same latency and throughput as S3 Standard. It is perfect for regulatory data that must be kept for years but needs to be available immediately for an auditor, offering the best balance of cost and access speed.
✗
Amazon S3 Glacier Deep Archive.
Why it's wrong here
Glacier Deep Archive is the lowest-cost storage in the cloud, but it has a minimum retrieval time of 12 hours. This fails the company's requirement to be able to retrieve records within a few minutes for audits, making it an unsuitable choice despite its superior cost-optimization for storage.

Quick reference

AWS S3 Storage Class Comparison

Storage Class	Min Duration	Retrieval	Use Case
S3 Standard	None	Immediate	Frequently accessed data
S3 Standard-IA	30 days	Immediate	Infrequent access, rapid retrieval
S3 One Zone-IA	30 days	Immediate	Non-critical infrequent data
S3 Intelligent-Tiering	None	Immediate–hours	Unknown or changing access patterns
S3 Glacier Instant	90 days	Milliseconds	Archive with instant retrieval
S3 Glacier Flexible	90 days	Minutes–hours	Archive, flexible retrieval
S3 Glacier Deep Archive	180 days	Hours	Long-term compliance archive

About these practice questions

One of 149 original SAA-C03 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →

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Written and reviewed by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

Last reviewed September 2026 · checked against the official Amazon Web Services exam blueprint

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