- A
S3 Glacier Instant Retrieval
Why wrong: Glacier Instant Retrieval provides millisecond access for quarterly-accessed archives — it costs more than Deep Archive and offers faster retrieval than needed.
- B
S3 Standard-IA
Why wrong: Standard-IA has retrieval fees and minimum storage of 30 days — it's not the lowest cost for 7-year compliance archives.
- C
S3 Glacier Flexible Retrieval
Why wrong: Glacier Flexible Retrieval offers 1-5 minute expedited or 3-5 hour standard retrieval — still more expensive than Deep Archive.
- D
S3 Glacier Deep Archive
Deep Archive is the lowest-cost S3 storage class with 12-48 hour retrieval times — perfect for long-term compliance archives that are rarely accessed.
Question 81 of 1,024
S3 Glacier Deep Archive — Lowest Cost Archival Storage
This CLF-C02 practice question tests your understanding of cloud technology and services. 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 company archives compliance records that must be retained for 7 years but will almost never be accessed. They need the absolute lowest storage cost with retrieval times of several hours being acceptable. Which S3 storage class should they use?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
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
✓
S3 Glacier Deep Archive
S3 Glacier Deep Archive is designed for long-term retention of data that is accessed rarely, with retrieval times of 12 hours or more, making it the lowest-cost S3 storage class. For compliance records that must be retained for 7 years and almost never accessed, with acceptable retrieval times of several hours, this class provides the absolute minimum storage cost while meeting the retrieval time requirement.
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.
- ✗
S3 Glacier Instant Retrieval
Why it's wrong here
Glacier Instant Retrieval provides millisecond access for quarterly-accessed archives — it costs more than Deep Archive and offers faster retrieval than needed.
- ✗
S3 Standard-IA
Why it's wrong here
Standard-IA has retrieval fees and minimum storage of 30 days — it's not the lowest cost for 7-year compliance archives.
- ✗
S3 Glacier Flexible Retrieval
Why it's wrong here
Glacier Flexible Retrieval offers 1-5 minute expedited or 3-5 hour standard retrieval — still more expensive than Deep Archive.
- ✓
S3 Glacier Deep Archive
Why this is correct
Deep Archive is the lowest-cost S3 storage class with 12-48 hour retrieval times — perfect for long-term compliance archives that are rarely accessed.
Clue confirmation
The clue word "never" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'Glacier Flexible Retrieval' with the lowest-cost option, but the question explicitly states 'absolute lowest storage cost' and 'retrieval times of several hours being acceptable,' which points to Glacier Deep Archive as the correct choice due to its significantly lower storage price.
Detailed technical explanation
How to think about this question
S3 Glacier Deep Archive uses a distributed erasure-coding storage system with a default retrieval time of 12 hours (expedited retrieval is not available), and its storage cost is approximately $0.00099 per GB/month, roughly 75% cheaper than Glacier Flexible Retrieval. Under the hood, data is stored across multiple Availability Zones using a custom durability algorithm, and the retrieval process involves a two-step restore operation that moves the object to a temporary S3 bucket before it can be accessed. A real-world scenario is financial institutions archiving trade records for regulatory compliance, where retrieval times of 12-48 hours are acceptable and the primary goal is minimizing long-term storage expenditure.
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.
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 |
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Cloud Technology and Services — This question tests Cloud Technology and Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: S3 Glacier Deep Archive — S3 Glacier Deep Archive is designed for long-term retention of data that is accessed rarely, with retrieval times of 12 hours or more, making it the lowest-cost S3 storage class. For compliance records that must be retained for 7 years and almost never accessed, with acceptable retrieval times of several hours, this class provides the absolute minimum storage cost while meeting the retrieval time requirement.
What should I do if I get this CLF-C02 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: "never". Absolute qualifier. True only if the statement has zero exceptions — be cautious of options that seem obvious but break down in edge cases.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more ways this is tested on CLF-C02
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which AWS storage class is optimized for long-term archival where data is rarely accessed and retrieval time of several hours is acceptable?
medium- A.S3 Standard-IA
- B.S3 One Zone-IA
- ✓ C.S3 Glacier Deep Archive
- D.S3 Intelligent-Tiering
Why C: S3 Glacier Deep Archive is designed for long-term archival of data that is accessed rarely, with retrieval times ranging from 12 to 48 hours. This makes it the most cost-effective storage class for scenarios where retrieval latency of several hours is acceptable, such as compliance or regulatory archives.
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Last reviewed: Jun 11, 2026
This CLF-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 CLF-C02 exam.
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