- A
Keep new objects in S3 Standard for the first 14 days.
Correct. Standard is appropriate for the initial hot-access period because the data is read frequently and needs immediate performance. Using a cheaper archive tier too early would increase retrieval latency and likely access costs.
- B
Transition objects to S3 Standard-IA after 14 days.
Correct. Standard-IA fits the long middle period where objects are still retrievable quickly but accessed only occasionally. It lowers storage cost while preserving minutes-level retrieval.
- C
Transition objects to S3 Glacier Flexible Retrieval after 14 days.
Why wrong: Incorrect. Glacier Flexible Retrieval is better for archives with less urgent restore needs, but the first year still requires retrieval within minutes. Standard-IA is a better fit for that requirement.
- D
Transition objects to S3 Glacier Deep Archive after one year.
Correct. Deep Archive is the lowest-cost long-term option for data that is almost never read after the first year. It is appropriate once fast retrieval is no longer required.
- E
Disable versioning to make the lifecycle rules work correctly.
Why wrong: Incorrect. Versioning is not required to use S3 lifecycle transitions, and disabling it does not produce the requested access pattern or cost model. The savings come from storage-class changes, not versioning status.
SAA-C03 Design Cost-Optimized Architectures Practice Question
This SAA-C03 practice question tests your understanding of design cost-optimized architectures. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A photo studio stores original project archives in Amazon S3. Objects are read heavily for 14 days after upload, occasionally during the next 11 months, and almost never after one year. The team wants the lowest storage cost while keeping retrieval within minutes during the first year. Which three actions are best? Select three.
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Clue:
"first"Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Clue:
"never"Why it matters: Absolute qualifier. True only if the statement has zero exceptions — be cautious of options that seem obvious but break down in edge cases.
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
Keep new objects in S3 Standard for the first 14 days.
A is correct because S3 Standard is designed for frequently accessed data with low latency and high throughput, making it ideal for the first 14 days when objects are read heavily. After this period, transitioning to S3 Standard-IA reduces storage costs while still providing millisecond retrieval for occasional access during the next 11 months.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Keep new objects in S3 Standard for the first 14 days.
Why this is correct
Correct. Standard is appropriate for the initial hot-access period because the data is read frequently and needs immediate performance. Using a cheaper archive tier too early would increase retrieval latency and likely access costs.
Clue confirmation
The clue words "best", "first", "never" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Transition objects to S3 Standard-IA after 14 days.
Why this is correct
Correct. Standard-IA fits the long middle period where objects are still retrievable quickly but accessed only occasionally. It lowers storage cost while preserving minutes-level retrieval.
Clue confirmation
The clue words "best", "first", "never" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Transition objects to S3 Glacier Flexible Retrieval after 14 days.
Why it's wrong here
Incorrect. Glacier Flexible Retrieval is better for archives with less urgent restore needs, but the first year still requires retrieval within minutes. Standard-IA is a better fit for that requirement.
- ✓
Transition objects to S3 Glacier Deep Archive after one year.
Why this is correct
Correct. Deep Archive is the lowest-cost long-term option for data that is almost never read after the first year. It is appropriate once fast retrieval is no longer required.
Clue confirmation
The clue words "best", "first", "never" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Disable versioning to make the lifecycle rules work correctly.
Why it's wrong here
Incorrect. Versioning is not required to use S3 lifecycle transitions, and disabling it does not produce the requested access pattern or cost model. The savings come from storage-class changes, not versioning status.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates might choose Glacier Flexible Retrieval for the 14-day transition, overlooking that its retrieval time (minutes to hours) does not meet the 'within minutes' requirement for the first year, whereas Standard-IA provides both cost savings and instant retrieval.
Detailed technical explanation
How to think about this question
S3 Lifecycle policies use a combination of transition actions (e.g., to Standard-IA after 30 days minimum) and expiration actions to automate tiering. The 14-day transition to Standard-IA is valid because Standard-IA has a minimum 30-day storage charge, but the cost savings from reduced storage rates outweigh this penalty for data accessed occasionally. After one year, Glacier Deep Archive offers the lowest storage cost at $0.00099/GB/month, with retrieval times of 12-48 hours, which is acceptable for almost-never-accessed data.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this SAA-C03 question test?
Design Cost-Optimized Architectures — This question tests Design Cost-Optimized Architectures — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Keep new objects in S3 Standard for the first 14 days. — A is correct because S3 Standard is designed for frequently accessed data with low latency and high throughput, making it ideal for the first 14 days when objects are read heavily. After this period, transitioning to S3 Standard-IA reduces storage costs while still providing millisecond retrieval for occasional access during the next 11 months.
What should I do if I get this SAA-C03 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best", "first", "never". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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