SOA-C02 Cost and Performance Optimization Practice Question
A company stores infrequently accessed data in S3 Standard. They want to reduce storage costs without compromising immediate accessibility. What is the MOST cost-effective solution?
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
✓
Use S3 Standard-IA storage class.
The most cost-effective solution is to use S3 Standard-IA (Option B). S3 Standard-IA is designed for infrequently accessed data that requires immediate access; it offers lower storage costs than S3 Standard while maintaining low latency and high throughput. Option A (S3 Glacier Flexible Retrieval) has even lower storage cost but retrieval times of minutes to hours, which does not meet the requirement of immediate accessibility. Option C (S3 Intelligent-Tiering) automatically moves data between tiers to optimize costs, but it includes monitoring and automation charges that may not be cost-effective for data that is consistently infrequently accessed; also, it does not guarantee lower cost than Standard-IA for this pattern. Option D (create a lifecycle policy to delete after 30 days) would lose data permanently and is not a storage class; it also does not address cost savings for long-term storage.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use S3 Glacier Flexible Retrieval.
Why it's wrong here
S3 Glacier Flexible Retrieval is designed for archival data where retrieval times of minutes to hours are acceptable, and objects must be restored before they can be accessed. This fails the requirement for immediate access to the infrequently stored data, and the 90-day minimum storage duration also makes it cost-inefficient for data that may be transitioned again or deleted sooner.
- ✓
Use S3 Standard-IA storage class.
Why this is correct
S3 Standard-IA is purpose-built for data that is accessed infrequently but requires millisecond access when requested. It offers the same durability and high availability as S3 Standard at a lower storage price, with a per-GB retrieval fee and a 30-day minimum storage duration. This directly matches the company's usage pattern of infrequently accessed data without sacrificing immediate availability.
- ✗
Move data to S3 Intelligent-Tiering.
Why it's wrong here
S3 Intelligent-Tiering automatically moves objects between access tiers based on changing patterns, but it charges a monthly monitoring and automation fee per object. Since the company already knows its data is infrequently accessed, paying this overhead is unnecessary when a static storage class like Standard-IA delivers the same cost benefit without the extra fee.
- ✗
Create a lifecycle policy to delete objects after 30 days.
Why it's wrong here
A lifecycle policy that deletes objects after 30 days is not a storage class and would permanently remove the data, which is unacceptable for infrequently accessed data that must be retained. Lifecycle policies are meant to transition objects to more cost-effective storage classes or expire them after a business-appropriate retention period, but deleting solely to save cost destroys the data instead of optimizing its 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 |
Go deeper
Related to this question
About these practice questions
Courseiva writes every SOA-C02 question from scratch — 1,169 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SOA-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SOA-C02 exam.